Đáp án:

I:

1.to/on/by

2.on/on

3.with/in

4.in

5.on/on/of

6.in/of

7.on

8.on

9.on

10.at

11.at

12.in

II:

1.is raining/stay/read

2.doing/am writing

3.Where will Lan and Ba go/will visit

4.will have

5.playing

6.to make

7.will be

8.will meet

9.hold

11.go

12.are practicing

13.waste

14.to drink

15.does

17.to come

18.are going 

III:

1.We always come to class on time.

2.How many hours does he often work a week?

3.American students do not usually wear school uniforms.

4.Nam has Science class at 10.00 on Wednesday.

5.I like math because it is interesting.

6.What subject does Tom like best?

7.We want to work with you.

8.How do you know he likes meat?

9.Excuse me!Is there a post office near here?

10.Is that a letters you want to post,Mai?

11.Mai is interested in doing experiments

12.Please tell him I'll call again after 5.

13.Huong will be twelve on Saturday,November 20th.

Mỏi tay quá!!!!!

chúc em học tốt!!!