$I$
Câu 1:
1. happened
2. finished
3. past
Câu 2:
4. completed
Câu 3:
5. last
6. ago
7. yesterday.
Câu 4:
8. were
9. was
$II$
1. drove
2. met
3. put
4. spoke
5. wrote.
6. did
7. sat
8. ran
9. sang
10. stood
$III$
1.
(-) Tom didn't wite a letter.
(?) Did Tom write a letter?
2.
(+) They drove.
(?) Did they drive?
3.
(+) It was cold
(-) It wasn't cold
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