Choose the best answer :
6. B. if : nếu
7. C. once a month : 1 tuần/lần
8. D. on her own; Tự mình
9. B. calling
-> there's no use + Ving : vô ích để làm gì
10. A. do
11. C. won't he
12. D. at
13. C. could say ( sau wish lùi 1 thì )
14. A. did you use (ago)
15. C. a few
16. C. meeting
-> look forward to + VIng
17. C. anyone
18. B. am
19. a. who
20. D. did you last see
21. C. good -looking
22. D. too quickly
23. A. was talkig
24. C. both
25. A. rather
26. C. for
27. D. used to : đã từng
28. A. the/x
29. A. when : khi mà
30. C. spend : dùng