Đáp án:

Ex 1: (mình sẽ sửa lại những lỗi sai nhé)

1. (đúng)

2. wasn't→didn't

3. (đúng)

4. weren't→didn't

5. Did

6. (đúng)

7. wasn't→didn't

8. (đúng)

9. (đúng)

(mình thấy bạn hay lộn wasn't/weren't với didn't, trong thì Past Simple thì mình dùng "didn't+V" nhé)

Ex 2:

1. The doctor gave me an injection.

2. Did Paul get nice birthday present?

3. We had milk and biscuits for breakfast.

4. Tony didn't send an email to Sally.

5. Carol made tea, but she didn't drink it.

6. Did you sit next to Peter's class?

7. The children wrote essays about time. (câu này mình không chắc)

8. Sam did his homework yesterday.

9. Did they eat Chinese food on Saturday?

Ex 3:

1. rode

2. broke

3. were late-were

5. didn't read-told

6. had

7. Did-wear

8. didn't go

9. came

10. didn't feel

11. bought

12. Did-eat 

13. lost

(bài này có 16 ô trống mà đề cho có 14 từ nên có từ mình tự thêm)

Ex 4:

1. sold→bought

2. ago two days→two days ago

3. tought→said

4. fighted→fought

5. forgotten→has forgotten

6. choose→chooses

7. fall→felt

8. did spend→spent

9. spoke→speak

10. swum→has swum

     Chúc bạn học tốt ^ω^

            -Minhh-

1 

1. đúng

2. wasn't→didn't

3. đúng

4. weren't→didn't

5. did

6. đúng

7. wasn't→didn't

8. đúng

9. đúng

2

1. The doctor gave me an injection.

2. Did Paul get nice birthday present?

3. We had milk and biscuits for breakfast.

4. Tony didn't send an email to Sally.

5. Carol made tea, but she didn't drink it.

6. Did you sit next to Peter's class?

7. The children wrote essays about time. 

8. Sam did his homework yesterday.

9. Did they eat Chinese food on Saturday?

3

1. rode

2. broke

3. were late-were

5. didn't read-told

6. had

7. Did-wear

8. didn't go

9. came

10. didn't feel

11. bought

12. Did-eat 

13. lost

4

1. sold→bought

2. ago two days→two days ago

3. tought→said

4. fighted→fought

5. forgotten→has forgotten

6. choose→chooses

7. fall→felt

8. did spend→spent

9. spoke→speak

10. swum→has swum