1. Those pomelo trees were planted by my father and uncle Tom last spring.

2. She asked us if our children were reading books in their room then.

3. Unless your son pays more attention, he won't understand the lessons well.

4. I haven't come back to my home village by train since I was a college student.

5. Linh can speak French fluently than I do.

6. Because Nick behaved badly at school, he was punished.

1. C => a

2. B => was taking

3. A => with

4. D => he

1. 0

2. 0

3. the

4. a

5. the

6. the

7. the

8. an

9. 0

10. a

1. wake - have

2. went - swam

3. met - had

4. did - watched

1. D

2. A

3. C

4. A

5. D

6. B

7. C

8. A

9. D

10. C