Học tốt nha!

3. (+) They built a new house.

(?) Did they build a new house?

4. (+) I was at the concert last sunday.

(?) Were you at the concert last sunday?

5. (+) I bought clothes in this clothes shop.

(-) I didn't buy clothes in this clothes shop.

6. (+) They were born in Korea.

(-) They weren't born in Korea.

7. (-) He didn't swim in the lake.

(?) Did he swim in the lake?

8. (-) We weren't at the gym last week.

(?) Were you at the gym last week?

9. (+) She went to her office by car.

(?) Did she go to her office by car?

10. (+) He was a good boy.

(?) Was he a good boy?

Bai4:

1. C

2. C

3. A

4. D

5. C

6. D

7. A

8. B

9. C

10. B

11. D

12. A