=>
I/
1. C : giảm thiểu
2. C
3. B ( delight to V)
4. D : sử dụng lại
5. B
6. D

II/
1 - c
2 - d
3 - a
4 - b

III/
1. My friend went to the market so as to buy some food.
2. It's difficult to learn Japanese.
3. Having been painted yellow, the room is very bright.
4. We saw a boy riding a bicycle.

5. "Nhat ky trong tu" was written by Ho Chi Minh many years ago.
6. Nam's sister is glad that he wins the first prize.

IV/
1. will have
2. didn't go
3. have done
4. Is the teacher explaining
V/
1. How often do you go to work by motorbike?

2. How long has Nam learned English?
3. When will your father visit Nha Trang?
4. How does Hoa feel?

I.
1. C
2. C
3. B
4. D
5. B
6. D

II.
1 - c
2 - d
3 - a
4 - b