Bài `2:`

1. was

2. were

3. was

4. were

5. was

6. was

7. were

8. was

9. was

10. were

11. were

12. were

13. was

14. was

15. were

Bài `3:`

1.

(-) He did not write a book.

(?) Did he write a book ?

2.

(-) She was not my boss.

(?) Was she my boss ?

3.

(+) They built a new house.

(?) Did they build a new house ?

4.

(+) I was at the concert last Sunday.

(?) Was I at the concert last Sunday?

5.

(+) You bought clothes in this clothes shop.

(-) You did not buy clothes in this clothes shop.

6.

(+) They were born in Korea.

(-) They were not born in Korea.

7.

(-) He did not swim in the lake.

(?) Did he swim in the lake ?

8.

(-) We were not at the gym last week.

(?) Were we 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?

Bài `4:`

1. C

2. C

3. A

1.

`-` He didn't write a book

`?` Did he write a book?

2. 

`-` She wasn't my boss

`?` Was she my boss?

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?

or Was I at the concert last Sunday?

5. 

`+` I bought clothes in this clothes shop

or You bought clothes in this clothes shop

`-` I didn't buy clothes in this clothes shop

or You didn't buy clothes in this clothes shop

6.

`+` They were born in Korea.

`-` They were not born in Korea

7.

`-` He did not swim in the lake.

`?` Did he swim in the lake?

8.

`-` We were not at the gym last week.

`?` Were we 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?