a) We can solve the problem.
………The problem can be solved……………………………………………………
b) People should stop experiments on animals.
………Experiments on animals should be stopped……………………………………………………
c) We might find life on another planet.
…………Life on another planet might be found…………………………………………………
d) We have to improve all the schools in the city.
……All the schools in the city have to be improved………………………………………………………
e) They are going to build a new bridge in the area.
…………A new bridge is going to be built in the area…………………………………………………

1.They sell jeans all over the world.

--> Jeans ..are sold all over the world......................................................

2.Lan took Maryam to Hoan Kiem lake. --> Maryam ...........was taken to Hoan Kiem lake bt Lan..................................

3.People have used the Internet for education in recent years. --> The Internet ............has been used for education in recent years ..................

4.My father started to give up smoking last year.--> My father has ..........given up smoking since last year.....................

5.They began to live in Ho Chi Minh City in 2000. --> They have ..........lived in HCM City since 2000............................

6.The last time I saw David was in 1995.--> I haven't ...............seen David since 1995....................

1. People can find gold everywhere on Earth.

Gold can be found everywhere on Earth

2. In the next century, the world will run out of oil.

In the next century, old will be ran out 

3. The volcano will affect the weather all over the world.

The weather all over the world will be affected by the volcano

4. Scientists should find the best solution to the problem of environmental pollution.

The best solution to the problem of environmental pollution should be found by scientists

5. A machine could do this work much more easily.

This work could be done much more easily by a machine

6. The police shouldn’t allow people to park here.

People should't be allowed to park here by the police

7. We have to pick up the fruit very early in the morning.

The fruit has to be picked up very early in the morning.

8. Someone must send this letter immediately.

This letter must be sent immediately.

9. You can find flowers in almost every part of the world.

FLowers can be found in almost every part of the world.

10. People may cook carrots or eat them raw.

Carrots may be cooked or eaten raw

11. You shouldn’t pronounce the “b” in “lamb”.

The "b"  in “lamb” shouldn't be pronounced 

12. Someone ought to wash these dirty dishes soon. 

These dirty dishes ought to be washed soon

70.They sell jeans all over the world. →Jeans………………ARE SOLD ALL OVER THE WORLD…………………………………………
71. They have found oild in the Antarctic →Oil………………HAS BEEN FOUND IN THE ANTARCTIC………………………………………………
72. They will probably translate her new book into English.
→Her new book………………WILL PROBABLY BE TRANSLATED INTO ENGLISH…………………………………..
73. Someone gave her this book an hour ago. →She……………………WAS GIVEN THIS BOOK AN HOUR AGO………………………………………..
74. Has someone repaired this telephone? →Has…………………THIS TELEPHONE BEEN REPAIRED?……………………………………….
75. “What do you think of the canteen coffee?” ask Ann. →Ann………………………………ASKED WHAT I THOUGHT OF THE CANTEEN COFFEE………………………………
76. “What foreign languages do they teach besides English?”
→I asked……………………WHAT FOREIGN LANGUAGES THEY TAUGHT BESIDES ENGLISH…………………………………
77. He has never played a computer game before.
→This is the first…………HE HAS EVER PLAYED  COMPUTER GAME ………………………………………
78. “Please lend me your dictionary, Quang,” said Hoa. →Hoa…………………………TOLD QUANG TO LEND HẺ HIS DICTIONARY………………………………….
79. “Can you turn down the radio?” Miss Jackson said to Mary.
→Miss Jackson……………ASKED MARY TO TURN DOWN THE RADIO……………………………………..
80. I last wrote to my uncle in July.
→I haven’t………………………WRITTEN TO MY UNCLE SINCE JULY………………………………..

70.They sell jeans all over the world. →Jeans are sold over the world.
71. They have found oild in the Antarctic →Oil has been found in the Antarctic.
72. They will probably translate her new book into English.
→Her new book will be probably translated into English.
73. Someone gave her this book an hour ago. →She was given this book an hour ago
74. Has someone repaired this telephone? →Has this telephone been repaired?
75. “What do you think of the canteen coffee?” ask Ann. →Ann ask me what I thought of the canteen coffee
76. “What foreign languages do they teach besides English?”
→I asked what foreign languages they taught besides English
77. He has never played a computer game before.
→This is the first time he has played a computer game.
78. “Please lend me your dictionary, Quang,” said Hoa. →Hoa told Quang to lend her his dictionary
79. “Can you turn down the radio?” Miss Jackson said to Mary.
→Miss Jackson told Mary to turn down the radio
80. I last wrote to my uncle in July.
→I haven’t written to my uncle in July

70.They sell jeans all over the world. →Jeans…are sold all over the world………………………………………………………
71. They have found oild in the Antarctic →Oil……has been found in the Antartica…………………………………………………………
72. They will probably translate her new book into English.
→Her new book…will probably be translated into English………………………………………………..
73. Someone gave her this book an hour ago. →She……was given this book an hour ago………………………………………………………..
74. Has someone repaired this telephone? →Has………this telephone been repaired?………………………………………………….
75. “What do you think of the canteen coffee?” asked Ann. →Ann…asked me if I thought of the canteen coffee……………………………………………………………
76. “What foreign languages do they teach besides English?”
→I asked…what foreign languages they taught besides English……………………………………………………
77. He has never played a computer game before.
→This is the first…time he has played a computer game………………………………………………
78. “Please lend me your dictionary, Quang,” said Hoa. →Hoa…told me to lend her my dictionary………………………………………………………….
79. “Can you turn down the radio?” Miss Jackson said to Mary.
→Miss Jackson…told Mary to turn down the radio ………………………………………………..
80. I last wrote to my uncle in July.
→I haven’t…written to my uncle since July……………………………………………………..

16) People speak English all over the world

English is spoken all over the world

17) Tom writes two poems

Two poems are written by Tom

18) She often takes her dog for a walk

Her dog is often taken for a walk by her

19) They don't make tea with cold water

Tea isn't made with cold water by them

20) The chief engineer instructs all the workers of the plan

All the workers of the plan were instructed by the chief

21) Somebody takes some of my books away

Some of my books are taken away 

22) They hold the meeting before the May Day

The meeting was held before the May Day

23) They repair the engine of the car

 The engine of the car is repaired 

24) The boys break the window and take away some pictures

THE window is broken and some pictures are taken away by the boys

25) People spend a lot of money on advertising every day

A lot of money is spent on advertising everyday

26) They use this room for the classroom

This room is used for the classroom

27) The teacher tells a story

A story is told by the teacher

28) Marry cuts the cake with a sharp knife

The cake is cut with a sharp knife by Marry

29) The children look at the women with a red hat

the women with a red hat is looked at by the children

30) She pulls my hat over my eyes

My hat is pilled over my eyes by her

17. English is spoken all over the world.

18. Jeans are sold all over the world.

19. Two department stores have been built this year.

20. Tom has been operated by the doctor since 10 o'clock.

21. The keys were returned by a man to me.

22. Jean cloth was made completely from cotton in the 18th century.

23. The exercises won't be corrected by the teacher tomorrow.

24. You will be met by my cousin at the station.

25. My bike can't be repaired.

I. Change these sentences into the passive

1. Do they sell computers in the supermarkets ?

=>.........Are computers sold in the supermarkets ?.................

2. Will they open the new hospital next month ?

=>........Will the new hospital opened next month ?.............

3. How can you solve this problem ?

=>.........How can this problem be solved? .......................

4. Why didn't they advise you not to buy this kind of clothing ?

=>......Why weren't you advised not to buy this kind of clothing?.......

5. *Jeans can make you look younger

=>........You can be made to look younger by jeans..................

6.. *He will fade his jeans by brushing them hard many times

=>.....His jeans will be faded by brushing them hard many times......

II. Change these sentences into the active

1. Traditionally, the ao dai was frequently worn by both men and women

.....Traditionally,both men and women frequently wore the ao dai....

2. Mr Nam was sent to the USA by his company for an economic research course

....Mr Nam's company sent to the USA for an economic research course...

3. The whole village was damaged by the storm

.....the storm damaged The whole village...............

4. Why are these jeans sold out so quickly?

................WHy do they sell out these jeans so quickly?.........

5. Mount Son Tra can be seen from twenty kms away

.........they can see Mount Son Tra from twenty kms away......

6. Flowers are going to be embroidered on the curtain by Lan

.........Lan is going to embroider Flowers on the curtain..............

2. Will the new hospital be opened next month?

I. Change these sentences into the passive

1. Do they sell computers in the supermarkets ? =>.........are computers sold in the supermarkets ? ..................................................................................

2. Will they open the new hospital next month ? =>.............will the new hospital opened next month ?.............................................................................

3. How can you solve this problem ? =>.........how can this problem be solved .........................................................................

4. Why didn't they advise you not to buy this kind of clothing ? =>.................why are you advised not to buy this kind of clothing........................................................................

5. *Jeans can make you look younger =>................you can be made ...to look younger by jeans..............................................................

6.. *He will fade his jeans by brushing them hard many times =>..........his jeans will be faded by brushing them hard many times ...................................................................

1. They sell jeans all over the world.

Jeans ______are sold all over the world. ________________________________________________________

2. They made jeans from the cotton.

 Jeans ______were made from the cotton. _______________________________________________________

3. People grow rice in tropical countries.

Rice______is grown in tropical countries. _________________________________________________________

4. I saw a strange man in the park last night.

A strange man ___was seen in the park last night. ____________________________________________________

5. Lan didn’t give him a new book last week.

He____wasn't given a new book last week ____________________________________________________________

6. She invited me to her house.

 I____was invited to her house by her_______________________________________________________________

7. You can’t make tea with cold water.

Tea _____can't be made with cold water___________________________________________________________

8. Peter is writing a letter to his friend  

=>A letter__is being written to his friend   by Peter____________________________________________________________

1. Meals are cooked by my brother every day

2. English is spoken all over the world