1. (B)

2. (D)

3. (B)

4. (D)

5. (A)

6. (C) calling

Cấu trúc: mind + V_ing

7. (B) for/ in

(be) used for V_ing ~ (be) used to V_inf: được dùng để

8. (B) broadcast

(to) air ~ (to) broadcast: phát sóng

9. (B) to let me borrow

Cấu trúc:

- get sb to V

- let sb V

10. (D) diseases

11. (C)

12. (B)

13. (A)

14. (C) to smoke → smoking

Cấu trúc:

allow + O + to V ~ allow V_ing

(Trong câu này không có tân ngữ nên dùng V_ing)

15. (D)

already `->` yet

16. James has gone to Scotland since last Friday.

17. The students were made to work hard for the exam by their teacher.

18. The robber is said to be caught while climbing up a fence.

19. When we were having dinner, there was a knock at the door.