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I/

1.was                                

2.was

3.were

4.were

5.wasn't

6.wasn't

7.wasn't

8.weren't

9.wasn't

10.was-wasn't

11.was

12.were

13.were-was

14.was

15.was

Điền was với ngôi số ít: I, she, he, it, a hat...

Điền were với ngôi số nhiều: we, you, they, students...

II/

16.remembered

17.wore

18.ate

19.took

20.had

21.didn't buy

22.didn't talk

23.Did they come

24.Did the windows close

25.didn't return

26.didn't eat

27.didn't go

28.didn't take

29.didn't have

30.Were Lan and Hoa

31.did they play

32.did Hoa try

33.talked

34.did they stop

35.did the student wear

36.Did you make

37.Dis you leave

38.Did you receive