I.
1.C , 2. C , 3. C , 4. B , 5. B
6. C , 7. C , 8. B , 9. D , 10. B
II.
1. If he washes my car, I will give him $10
2. Nga haven't met her parents since last Sunday.
3. I first visited Singapore in 2000
4. Children study in their rooms at present.
C.
II.
1. C , 2.D , 3. A , 4. B , 5. C
I. ko biết
II.
1. C , 2. D , 3.