3. Nam asked Nga if he could borrow her bike.

4. This is Phong's pen

5. The streets haven't been cleaned this week

6. Apples are not usually more expensive than oranges

7. He prefers playing golf to tennis.

8. Because Mai was careless, she broke the cup

9. When did they build the house?

10. Would you mind if I smoked here?

I. 

1. A

2. B

3. B

4. A

II.

1. D

2. A

3. B

4. B

5. C

3. nam asked nga if he could borrow her bike

4. this is Phong's pen

5. the streets haven't been cleaned this week

6. apples are not expensive than oranges

7. he prefers playing golf to playing tennis

8.because mai wass careless, she broke..

9. when did the house build?

10. would you mind if i smoked here?