1. went

2.played

3.ate

4.took

5.had

6. Didn't she buy

7.didnot talk

8.Didn't they come

9.werenot the windows closen

10.didnot return

11.didn't eat

12. didn't go

13.didn't  take

14. didnot have

15.were lan and hoa

16.did they play

17.did hoa try

18.talked

19.did they stop

20.did the students wear 

II-

1.went

2.played

3.ate

4.took

5.had

6.didn't she buy

7.didn't talk

8.didn't they come

9.weren't closed

10.didn't return

11.didn't eat

12.didn't go

13.didn't take

14.didn't have

15.Were Lan and Hoa at your....?

16.did they play

17.did Hoa try

18.talked

19.were they stopped

20.did the student wear

Chúc bn học tốt nha ^^