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December 16, 2015

Reaching the age of adolescence


Q1) what is puberty?

Ans: the process of physical changes by which an individual becomes capable of reproduction is called puberty.

Q2) which is the male sex hormone?

Ans: testosterone

Q3) which female organ produces estrogen and progesterone hormone

Ans: ovaries

Q4) which male organ produces testosterone

Ans: testes




Q5) what is the normal duration of menstrual cycle?

Ans: 28 to 30 days.

Q6) what is menopause?

Ans: at about 50 years of age, the menstrual cycle stops. This is known as menopause.

Q7) During which phase of the menstrual cycle is a mature egg released by one of the ovaries?

Ans: During the mid-cycle normally one mature egg cell is released by the ovary.

Q8) which pair of chromosomes determines the sex of a male and a female child?

Ans: sex chromosomes.




Q9) why do acne and pimples erupt on the skin during puberty?

Ans: during puberty, there is an increase in the activity of sweat and oil glands. The skin becomes oily and acne and pimples may erupt on the skin.

Q10) Differentiate between exocrine and endocrine glands?

Ans: Exocrine glands: the glands that releases its secretions with the help of a duct at a specific place is called an exocrine glands.
For example, the salivary glands secrete saliva in the mouth with the help of salivary duct.

Endocrine glands: the human body has several endocrine glands. They are pituitary glands, hypothalamus, thyroid
Gland, parathyroid gland, adrenal gland, pineal gland and reproductive glands.
The testes in the male and ovaries in the female form the reproductive endocrine glands.




Q11) Explain with an example why the pituitary glands is called the master gland?

Ans: the pituitary gland is called the master gland as its hormones control the activities of many other endocrine glands.
For example, the pancreas and adrenal glands are simulated by the pituitary gland to create insulin and adrenaline respectively.

Q12) why do tadpoles that grow in water deficient in iodine fail to develop into adult frog?

Ans: in frogs, metamorphosis is controlled by thyroxine produced by the thyroid gland, iodine is required for the proper production of thyroxine. This is why tadpoles that grow in water that id deficient in iodine fail to develop into adult frog.

Q13) list two ways by which young people may refrain from indulging in undesirable activities?

Ans: play outdoor games, develop hobbies such as painting, singing, photography, gardening or playing music. Awareness of the addictive nature of bad habits and their consequences will also help one to stay out of such activities.
Q14) write a short note on puberty in boys and girls.

Ans: in girls, during puberty, the hormones estrogen and progesterone develop female sexual features. The breasts begin to develop and the body becomes more rounded, especially the hips. The growth of the body accelerates and girls begins menstruating.
During puberty in boys, hormones from the pituitary gland and testosterone bring about the physical changes that make a boy mature into an adult male.

Q15) Explain the menstruation cycle in girls.

Ans: once a girl is an adolescent, menstruation occurs regularly once in about 28 to 30 days. This regular physiological process is called menstrual cycle. Menstruation begins at puberty. The first menstruation is termed menarche. In the beginning cycle may be irregular. After sometime it becomes regular. The menstrual cycle is controlled by certain hormones. During the mid-cycle normally one mature egg cell is released by the ovary. If the egg gets fertilized, it gets embedded in the uterus and begins to develop.
During each menstrual cycle, the wall of the uterus prepares to receive a fertilized egg. The uterine wall thickens and is richly supplied by additional blood vessels.


Q16) what is the importance of diet during adolescence?

Ans: a balanced diet of an adolescent should include the required amounts of carbohydrates, proteins, fats, vitamins and minerals to meet the needs of rapidly developing body. Food items like pulses, mushrooms, milk, eggs, fish and meat are rich in proteins.

Q17) How is the gender of a child determined ?

Ans: being a male or a female is dependent on the particular pair of chromosomes.
This pair is known as sex chromosomes. There are two  types of sex chromosomes “ x” and “ y “. Every cell of a male has one “x” and one “ y”, whereas the pair of sex chromosomes in a female has two “ x “ chromosomes. During fertilization, as sperm having “x” chromosomes or a “ y “ chromosomes fuses with an egg. The fertilized egg will have “x x “chromosomes. This zygote with “xx” chromosome will develop into a baby girl. If a sperm having “y” chromosomes, fuses with an egg “ x” then the fertilized egg has “x y “ chromosomes. This zygote with “x y “ sex chromosomes will develop into a baby boy.












December 14, 2015

light


Q1) if the angle of incidence formed on a plane mirror is 63 , what will be the measure of the angle of reflection?

Ans: According to the second law of reflection, if the angle of incidence is 63, then the angle of reflection will be 63.


Q2) How will the light falling on a surface of plane mirror travel?

Ans:  when a beam of light strike a smooth surface like that of a mirror, the rays are reflected . the reflected rays are also parallel to each other.


Q3) how will the light falling on a rough surface of a rock travel?

Ans: The parallel rays of light after striking a rough surface scatter in different directions.



Q4) Define refraction ?

Ans: The path of light changes as it passes from one medium to another. The path of the ray bends. This is known as refraction.


Q5) what is dispersion of light?

Ans: The splitting of white light into its components colours is called dispersion of light.


Q6) On which layer of the human eye is the image formed?

Ans: The image is formed on the retina


Q7) where in the human eye is the aqueous humor found?

Ans: Between the cornea and the iris is a liquid called the aqueous humor.


Q8) what type of lens is used to correct the defect of nearsightedness?

Ans: Concave lens.


Q9) explain reflection of light?

Ans: When light bounces after striking a surface, we say the light has reflected. This known as reflection of light.


Q10) what is the point of incidence?

Ans: The point at which the incident ray strikes the reflecting surface is called point of incidence.


Q11) what is virtual image?

Ans: The image which is not formed by actual rays of light , it cannot be captured on a screen. Such an image is known as a virtual image.


Q12) Differentiate between regular and irregular reflection.

Ans: When a beam of light strikes a smooth surface like that of a mirror, the rays are reflected. The reflected rays are also parallel to each other. Such a reflection is called specular  or regular reflection.

The parallel rays of light after striking a rough surface scatter in different directions, this type of reflection is known As diffuse or irregular reflection.


Q13) List any two features of an image formed by a plane mirror.

Ans: The image is upright and virtual
·       The image is laterally inverted.


Q14) List the three layers of human eye?

Ans: The human eye has three layers:
 The outer most sclera, chroid and the inner retina.


Q15) Explain the first law of reflection with a diagram?

Ans: The incident ray, the normal drawn at the point of incident and the reflected ray all lie in the same plane.


Q16) how is an image in a plane mirror?

Ans:  When light rays from an object fall on the surface of the plane mirror, they get reflected back. These reflected rays meet at a point when extended backward, the image is formed at this point. As the image is not formed by actual rays of light, it cannot be captured on a screen, such an image is known as a virtual image.


Q17) what is farsightedness? How can it be corrected?

Ans: A person with farsightedness ( hyperopia) has difficulty seeing objects that are near , this is because the light rays from a closer distance become focused behind the retina, this is caused by an eye ball that is too short.
This is corrected with a convex lens, which converges light and focuses it on the retina.


Q18) list the causes of blindness. Explain any one of them?

Ans: As a person ages, the eye sight is affected , most often the retina degenerates. As a result, the person has blurred vision and has difficulty in reading.

-      Diabetes, Cataract and Glaucoma are other causes of blindness in elderly people.

Glaucoma is a condition in which the pressure within the eye is increased due to an excess of aqueous humor liquid. It occurs in elderly people and can be managed with medicines and surgery.
  

Chemical effects of electric current


Q1) What is an atom?

Ans:An atom is an extremely small particle. It is made up of protons, neutrons, and electrons.


Q2) Differentiate between protons and electrons?

Ans:Protons are positively charged while neutrons do not have any charge. Electrons are presented in the space surrounding the nucleus of the atom. Electrons are negatively charged.


Q3) What is an anion?

Ans:Anions are negatively charged ions.


Q4) What charge does a cation carry?

Ans:Cations are positively charged ions.



Q5) Define ionization?

Ans: Ionisation is the process by which molecules break into cations and anions.


Q6) Give an example of an electrolytes?

Ans:Hydrochloric acid, sulphuric acid


Q7) Name a strong and a weak electrolyte.


Ans:Strong electrolyte: Nitric acid
Weak electrolyte: phosphoric acid


Q8) name the two electrodes in an elcetrolyte cell 

Ans: Anode and cathode


Q9) what is electrolysis?

Ans: The chemical change induced by the passage of electric current through electrolyte is known as electrolysis.


Q10) Mention one use of electroplating.

Ans: The purpose of electroplating is to coat a metal having a certain desired property such as wear resistance, corrosion protection, lubrication and aesthetic appeal .


Q11) Differentiate between anode and cathode?

Ans: The electrode connected to the positive terminal is the anode (positive electrode) and the electrode connected to negative terminal is the cathode.


Q12) what are conductors and insulators?

Ans: Some materials allow electricity to pass through them. Such materials are called conductors.
Materials that do not allow electricity to flow through them , such materials are called nonconductors of electricity or insulators.


Q13) What happens to common salt when it dissolves in water?

Ans: When table salt ( NaCl) dissolves in water, its molecules break into sodium ions and chloride ions. The sodium ions carry positive electric charge and the chloride ions carry negative electric charge.


Q14) why glucose a non-electrolysis?

Ans: Glucose and alcohol dissolve in water but do not form ions. Such compounds are called non-electrolysis.
All solutions that do not form ions do not conduct electricity.

Q15) why is sulphuric acid called an electrolyte?

Ans: A strong electrolyte is a compound such as Sulphuric acid that when dissolved in water ionizes completely. All its molecules break down to form cation and anions. Strong electrolytes are good conductor of electricity.


Q16) what is electroplating?

Ans: Electroplating is the process of deposition of a layer of one metal on top of another with the help of electric current.


Q17) Draw a labelled diagram to show that hydrochloric acid forms a strong electrolyte.

Ans:








Q18) Explain electrolysis of NaCl?

Ans: When table salt ( NaCl) dissolves in water, its molecules break into sodium ions ( Na+) and chloride ions ( Cl -) . the sodium ions carry positive electric charge and the chloride ions carry negative electric charge.
When a solution containing ions is subjected to electric current, the ions move . it is due to the movement of the ions that electric current flows through the solution. Thus ions conduct electric current through the solution. The more the number of ions present, the more the current that can be carried. Compounds such as common salt that dissolve in water and separate into ions, allow the conduction of electricity through the solution.



Q19) Explain with a suitable example the electroplating of a metal object.

Ans: The metal object which is to be electroplating is fixed in an electroplating chamber at the cathode.
The metal that is to be coated is made the anode. The chamber is then filled with an electrolyte which is generally the salt of the metal to be plated.
For example, in copper plating , a pure copper piece is fixed at the anode, the object to be plated with copper is fixed at the cathode and copper sulphat solution used as the electrolyte.

When the electric supply is switched on, the copper plate at the anode releases positively charged copper ions.
The copper ions move from the anode to the cathode through the solution and deposit on the metal object at the cathode. In copper electroplating, the electrolyte, copper sulphate solution remains unchanged.


Q20) Draw a labelled diagram of an electrolytic cell








December 12, 2015

The role of the police and that of the court


Q1) What is a First Information Report ( FIR)?

Ans: When a person becomes a victim or witness of a crime, he or she should file a First Information Report at the police station. The police will begin to investigate in the offence only after FIR has been lodged.

Q2) who is a public prosecutor?

Ans: Any criminal offence is deemed to be an offence against the society and therefore against the state. A public prosecutor is a lawyer who fights for or defends the state. He or she is appointed by the state.

Q3) on the basis of what factor does the judge decide a case?

Ans: The judge hears both the lawyers of the case. Then based on the evidences or proofs presented by the police, witnesses, defendant lawyer and prosecutor, the judge gives his or her verdict.


Q4) Describe the procedure to file an FIR?

Ans:The police station is required to register an FIR whenever information is given that a crime has been committed in order to avoid. The police must file an FIR and then transferred to the case to the concerned police station.
The FIR must be hand written, signed and prepared in duplicate. The FIR should specify the place, date and time of the incident.

Q5) Why should every accused be held innocent until proved otherwise? What will happen if this is not so?

Ans:Every accused is held innocent till proven guilty by a court of law. Therefore it is a fair and open trail is mandatory. Witnesses will be cross examined by both the lawyer and the prosecutor. Only if the public prosecutor proves guilty beyond doubt the verdict can be given, otherwise innocent people could be punished.

Q6) Explain the process of investigating crimes.

Ans:one of the most important duties of the police is to investigate crimes that have been committed.
    ·       Any crime committed in an area has to be reported at the police station concerned.
    ·       The officer of the police station has to register a First Information Report ( FIR) whenever information is given.
    ·       Even if the crime committed is not within the purview of the concerned police station, it must be registered in order to avoid unwanted delay, the officer there must file an FIR, the case can later be transferred to the police station concerned..
    ·       The police cannot decide the guilty of the accused – that is the work of the judiciary.  



November 23, 2015

Active and Passive Voice


There are two ways to express an action of a subject in relation to its object
 • Active voice
• Passive voice
In “active voice” subject acts upon object, while in “passive voice” object is acted upon by subject. It can also be said, in “active voice” subject does a work on object, while in “passive voice” object is worked on by subject. The normal structure of an active voice sentence is subject + verb + object but in passive the normal structure of sentence is reversed according to certain rules and becomes like object + verb + subject. The real meaning of a sentence does not change if the sentence is expressed either by active voice or by passive voice. The active voice is mostly used in writing because it gives a direct and more concise meaning. Passive voice is used sometimes due to the following reasons.
 When intentionally hiding the subject of sentence. For example, a student who failed in exam might say, some chapters were not studied.
Another example. Women were not treated as equals
When passive voice better explain thought of sentence. For example, to say, cloth is sold in yards, is more meaningful than to say, Shop keepers sell cloth in yards.
When passive voice better emphasizes the main though of the sentence. For example, a man who is being teased by another person might say in anger, “you will be beaten by me” When subject is not exactly known. For example, His watch was stolen. It is not known that who stole his watch, the subject (thief) is not exactly known so it is better to use passive voice for such sentence. There are certain rules for expressing a thought in passive voice or for changing a sentence from active voice to passive voice.
Fundamental Rules for changing from active voice to passive voice the places of subject and object are interchanged i.e. the object shifts to the place of subject and subject shifts to the place of object in passive voice.
Example.
Active voice: I write a letter.
Passive voice: a letter is written by me.
Subject (I) of sentence shifted to the place of object (letter) and object (letter) shifted to the place of subject (I) in passive voice.
Sometimes subject of sentence is not used in passive voice. Subject of sentence can be omitted in passive voice, if without subject it can give enough meaning in passive voice.
Examples.
Passive voice: cloth is sold in yards
3rd form of verb (past participle) is always used as main verb in sentences of passive voice for all tenses. Base form of verb or present participle will be never used in passive voice.
The word “by” is used before subject in sentences in passive voice.
Example.
Active voice: He sings a song.
Passive voice: A song is sung by him.
The word “by” is not always used before subject in passive voice. Sometimes words “with, to, etc” may also be used before subject in passive voice.
Examples.
Active voice: The water fills the tub.
Passive voice: The tub is filled with water.
Active voice:  He knows me.
Passive voice: I am known to him.
Auxiliary verbs are used passive voice according to the tense of sentence.
Note: First 5 rules are usually same for all tenses in passive voice. 
Rule No. 6 is about the use of auxiliary verb in passive voice which differs for each tense. The auxiliary verbs of passive voice are used according to tense of sentence of its active voice form. The auxiliary verb for each tense is given in the following table with explanation and examples. Click on the following links.



PASSIVE VOICE FOR ALL TENSES RULES
The places of subject and object in sentence are inter-changed in passive voice.
3rd form of verb (past participle) will be used only (as main verb) in passive voice.
Auxiliary verbs for each tense are given below in the table.
Present Simple Tense (passive Voice)
Auxiliary verb in passive voice: am/is/are
Active voice:
He sings a song.
He does not sing a song.Does he sing a song?
Passive voice:
A song is sung by him.
A song is not sung by him.
Is a song sung by him?

Present Continuous Tense (passive Voice)
Auxiliary verb in passive voice: am being/is being/are being
Active voice:
I am writing a letter
I am not writing a letter.
Am I writing a letter?
Passive voice:
A letter is being written by me.
A letter is not being written by me.
Is a letter being written by me?
  

Present Perfect Tense (passive Voice)
Auxiliary verb in passive voice: has been/have been
Active voice:
She has finished his work
She has not finished her work.
Has she finished her work?
Passive voice:
Her work has been finished by her.
Her work has not been finished by her.
Has her work been finished by her?


Past Simple Tense (passive Voice)
Auxiliary verb in passive voice: was/were
Active voice:
I killed a snake
I did not kill a snake.
Did I kill a snake?
Passive voice:
A snake was killed by me.
A snake was not killed by me.
Was a snake killed by me?

  
Past Continuous Tense (Passive Voice)
Auxiliary verb in passive voice: was being/were being
Active voice:
He was driving a car.
He was not driving a car.
Was he driving a car?
Passive voice:
A car was being driven by him.
A car was not being driven by him.
Was a car being driven by him?

Past Perfect Tense (Passive Voice)
Auxiliary verb in passive voice: had been
Active voice:
They had completed the assignment.
They had not completed the assignment.
Had they completed the assignment?
Passive voice:
The assignment had been completed by them.
The assignment had not been complete by them.
Had the assignment been completed by them?

  
Future Simple Tense (Passive Voice)
Auxiliary verb in passive voice: will be
Active voice:
She will buy a car.
She will not buy a car.
Will she buy a car?
Passive voice:
A car will be bought by her.
A car will not be bought by her.
Will a car be bought by her?
Future Perfect Tense (passive Voice)
Auxiliary verb in passive voice: will have been
Active voice:
You will have started the job.
You will have not started the job.
Will you have started the job?
Passive voice:
The job will have been started by you.
The job will not have been started by you.
Will the job have been started by you?

Note: The following tenses cannot be changed into passive voice.
Present perfect continuous tense
Past perfect continuous tense
Future continuous tense
Future perfect continuous tense
Sentence having Intransitive verbs
Fundamental Rules
The places of subject and object in sentence are inter-changed in passive voice.
3rd form of verb (past participle) will be used only (as main verb) in passive voice.
Auxiliary verbs for each tense are given below in the table.


Passive voice for Present/Future Modals
“CAN, MAY, MIGHT, SHOULD, MUST, OUGHT TO”
The places of subject and object in sentence are inter-changed in passive voice.
3rd form of verb (past participle) will be used only (as main verb) in passive voice.
To change sentences having present/future modal into passive voice, auxiliary verb “be” is added after modal in sentence.
   Passive voice for Present/Future Modals
“CAN, MAY, MIGHT, SHOULD, MUST, OUGHT TO”
Auxiliary verb in passive voice: be
Active voice: CAN
She can play a violin.
She cannot play a violin.
Can she play a violin?
Passive voice: CAN BE
A violin can be played by her.
A violin cannot be played by her.
Can a violin be played by her?
Active voice: MAY
I may buy the computer.
I may not buy the computer.
May I buy the computer?
Active voice: MAY BE
The computer may be bought by me.
The computer may not be bought by me.
May the computer be bought by me?
Active voice: MIGHT
Guests might play chess.
Guests might not play chess.
Active voice: MIGHT BE
Chess might be played by guests.
Chess might not be played guests.
Active voice: SHOULD
Students should study all lessons.
Students should not study all lessons.
Should students study all lessons?
Active voice: SHOULD BE
All lessons should be studied by students.
All lessons should not be studied by students.
Should all lessons be studied by students?
Active voice: MUST
You must learn the test-taking strategies.
You must not learn the test-taking strategies.
Active voice: MUST BE
Test-taking strategies must be learnt by you.
Test-taking strategies must not be learned by you.
Active voice: OUGHT TO
They ought to take the examination.
Active voice: OUGHT TO BE
The examination ought to be taken by them.

Passive voice for Past Modals

“MAY HAVE, MIGHT HAVE, SHOULD HAVE, MUST HAVE, OUGHT TO HAVE”
The places of subject and object in sentence are inter-changed in passive voice.
3rd form of verb (past participle) will be used only (as main verb) in passive voice.
To change sentences having past modal into passive voice, auxiliary verb “been” is added after modal in sentence.
   Passive voice for Present/Future Modals
 “MAY HAVE, MIGHT HAVE, SHOULD HAVE, MUST HAVE, OUGHT HAVE TO”
Auxiliary verb in passive voice: been
Active voice: MAY HAVE
You may have availed the opportunity.
You may not have availed the opportunity.
Active voice: MAY HAVE BEEN
The opportunity may have been availed by you.
The opportunity may not have been availed by you.
Active voice: MIGHT HAVE
He might have eaten meal.
He might not have eaten meal.
Active voice: MIGHT HAVE BEEN
Meal might have been eaten by him.
Meal might not have been eaten by him.
Active voice: SHOULD HAVE
You should have studied the book.
You should not have studied the book.
Active voice: SHOULD HAVE BEEN
The book should have been studied by you.
The book should have not been studied by you.
Active voice: MUST HAVE
He must have started job.
He must not have started job.
Active voice: MUST HAVE BEEN
Job must have been started by you.
Job must not have been started by you.
Active voice: OUGHT TO HAVE
You ought to have helped him.
Active voice: OUGHT TO HAVE BEEN
He ought to have been helped by you


* Change into passive voice
1. He sings a song.
………………………………………………………………………………
2. The boy killed the spider.
………………………………………………………………………………
3. Help him.
………………………………………………………………………………
4. Farmers sow maize in the rainy season.
………………………………………………………………………………
5. Are you writing a letter?
………………………………………………………………………………
6. The workers were digging a canal.
………………………………………………………………………………
7. I will finish the job by the end of this week.
………………………………………………………………………………
8. Have you finished your job?
………………………………………………………………………………
9. They have informed him of his mother’s death.
………………………………………………………………………………
10. They took all the necessary precautions.
………………………………………………………………………………
11. The committee presented the report
……………………………………………………………………………
12. Karl watched the scary movie alone.
………………………………………………………………………………
13. The burglar stole the television in the house.
………………………………………………………………………………
14. I opened the window in the study for some fresh air.
………………………………………………………………………………
15. The tornado lifted the house into the air.
………………………………………………………………………………
16. Elizabeth wrote the song as part of a holiday celebration.
………………………………………………………………………………
17. Philip and Daisy selected the music for the dance.
………………………………………………………………………………
18. While eating dinner, the family discussed the day’s events.
………………………………………………………………………………
19. They teach three languages at school.
………………………………………………………………………………
20.I bought the potatoes yesterday.
………………………………………………………………………………
21.They sell milk in this shop.
………………………………………………………………………………
22.I have translated the whole text.
………………………………………………………………………………
23.By six o’clock they had finished the work.
………………………………………………………………………………
24.They will show this film on TV.
………………………………………………………………………………
25.We received his letter after his departure.
………………………………………………………………………………
26.The dogs have never attacked the people here.
………………………………………………………………………………
27.She had showed me the dress after I came home.
………………………………………………………………………………
28.The doctor will prescribe the new medicine tomorrow.
………………………………………………………………………………
29.Bees gather honey from flowers.
………………………………………………………………………………
30.They broke the window last week.
………………………………………………………………………………
31.When I came home they had eaten the sweets.
………………………………………………………………………………
32.We shall do the work in the evening.
………………………………………………………………………………
33.Teachers usually do corrections in red ink.
………………………………………………………………………………
34.They haven’t brought my skates back yet.
………………………………………………………………………………
35.We will insist on strict discipline.
………………………………………………………………………………
36.They had switched the light before they came in.
………………………………………………………………………………
37.The old man has just showed us the way out of the wood.
………………………………………………………………………………
38.The storm drove the ship against the rock.
………………………………………………………………………………










·        Underline the best option:

1. The book was published/published in 2010.
2. My parents will lend/will be lent me some money to buy a new car.
3. It is said /says that some sports involve serious risks.
4. Lots of workers have been made/have made redundant as a result of the crisis.
5. My father was bought/ bought me a CD.
6. Fewer letters are written/write nowadays.
7. The TV presenter has been made/has made lots of mistakes today.
8. Where are you being lived/are you living?
9. My children are liked/like pasta.
10. Emails are sent/send more and more.
* Say if the sentences are Right or Wrong. Correct the mistakes.

1. It is believed that he to be a millionaire.
……………………………………………………………………
2. My father is worked in an office.
……………………………………………………………………
3. The actor’s contract has been expired.
……………………………………………………………………
4. Pam got her nails do yesterday.
……………………………………………………………………
5. Statistics predict that the crisis get even worse next year.
……………………………………………………………………
6. Is lunch being cooked by he?
……………………………………………………………………
7. Candy can’t be teach. She never listens!
……………………………………………………………………
8. Will the children be invited to the birthday party by she?
……………………………………………………………………
9. The actress was thought to been frequently blackmail.
……………………………………………………………………
10. The members of the club have to be elected the chairman.
…………………………………………………………………

·        Change the sentences from active to passive & vice versa.

1. I have had my hair cut.
……………………………………………………………………
2. Politicians say that teachers don’t work hard.
……………………………………………………………………
3. Peter has been given a promotion.
……………………………………………………………………
4. It’s believed that there is life in the afterlife.
…………………………………………………………………….
5. Will you send me a postcard from New York?
……………………………………………………………………
6. Nothing is done to help the homeless.
……………………………………………………………………
7. People think that unemployment is increasing.
……………………………………………………………………
8. Popular TV series are broadcast on AXN.
……………………………………………………………………
9. Something like that can’t be done.
……………………………………………………………………
10. My husband was cooking dinner when someone knocked at the door.
……………………………………………………………………

* Put the verb in bracket in the correct active/passive voice & tense.
1. The watch ………………. I’ll take it to the watchmaker (break).
2. Someone ……………… at you. Do you know him? (look)
3. The stain on my coat ……………… (remove).
4. The criminal ………………… (catch) yesterday.
5. REM …………… a compilation album (release)
6.  This castle ………………… in 1639 (build).
7. Mary ……………… a nice birthday present (give).
8. These laptops ……………… in China (make).
9. The plane …………… (just/ land).
10. Something strange ……………… to Susan this morning (happen).