I

16. C=> because of

because of+ N/Ving

17. A=> tell

had better+ V: nên làm gì

18. B=> I would

câu tường thuật: S+ asked sb if+ S+ V lùi thì

II

19. A

thể hiện sự hy vọng

20. C

đáp lại lười khen

III

21. If she liked spicy food, she would eat any food at the party

22. have been discussed since lask week

bị động htth: S+ have/has+ been+ P2

23. me for not coming to visit me the previous day

apologies sb for sth:xin lỗi ai vì cái gì

24. The man who my mother is talking to is our new English teacher

who thay thế cho danh từ chỉ người "the man", làm tân ngữ

25. Although Sarah hadn't studied Chinese before, she could use the language very well

Although+ clause, clause: mặc dù

IV

26, to take

refuse to do something: từ chối làm gì

27. have become

since=> htht: S+ have/has+ P2

28. heard 

S+ Vqktd+ when+ S+ Vqkd

29. to play

to V: chỉ mục đích

30. growing

rút gọn mđqh có đtqh làm chủ ngữ=> Ving