4 He worked as an accountant from 1995 to 2000.
→ He didn’t work as an accountant from 1995 to 2000.
→ Did he work as an accountant from 1995 to 2000?

5 He wanted to buy some envelopes yesterday.
→ He didn’t want to buy any envelopes yesterday.
→ Did he want to buy any envelopes yesterday?

6 Peter looked after his baby sister last Sunday.
→ Peter didn’t look after his baby sister last Sunday.
→ Did Peter look after his baby sister last Sunday?

IX.

1 It was hot last summer.
→ It wasn’t hot last summer.
→ Was it hot last summer?

2 They played football yesterday.
→ They didn’t play football yesterday.
→ Did they play football yesterday?

3 Last week I had an important meeting.
→ Last week I didn’t have an important meeting.
→ Did you have an important meeting last week?

VIII.

1 B

2 F

3 C

4 D

5 A

6 E

1 d

2 f

3 a

4 c

5 g

6 b

7 e

8 h

= 10 bạn nhé

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