IV.

3. She is wearing warm clothes so as not to get cold.

5. It's very interesting to travel around Viet Nam.

6. It's dangerous to play in the kitchen.

7. Would you mind opening the windows for me?

8. Would you mind if I turn on the television?

9. Would you mind if I use your computer?

10. This house is used very often.

11. This car was cleaned by Mr.Nam yesterday.

12. Your bicycle will be repaired tomorrow.

13. Rice is planted in those fields.

14. A Math test will be done next week.

15. That computer was bought by my father last week.

16. A new hospital has been built near the airport.

17. Recycled plastic is used to make toys.

18. The Internet has been used all over the world.

V.

1. It's difficult to do these exercises.

2. Would you mind turning off the light? -No problem.

3. This car was cleaned by Mr.Ba yesterday.

4. Would you mind if I turn off the lamp? -Not at all.

5. A new school will be built near my house next year.

VI.

1. The classroom is cleaned everyday.

2. Football is played all over the world.

3. A car will be built next year.

4. The food will be prepared by my mother.

5. Your homework will be finished on time.

6. The bicycle has just been prepared by my brother.

7. These exercises must be done carefully.

8. That school was built five years ago.

9. This house has been used for 2 years.

10. The telephone was invented by Bell in 1876.

11. Car tires can be recycled to make pipes and floor coverings.

12. The wall must be cleaned carefully.

13. A new house is going to be bought next year.

VII.  A.

1. C

2. A

3. A

4. D

5. B

B.

1. A

2. C

3. D

4. C

5. C

6. B

C.

1. C

2. B

3. A

4. A

5. B