=>
10. A adj as S V = although
11. D which -> mệnh đề quan hệ
12. D mệnh đề quan hệ

13. B In spite of + N/Ving : mặc dù
14. C so adj that : quá đến nỗi

15. B for + khoảng time
16. D thank sb for sth
17. D accused sb of doing sth
18. B unless = if not

10, A - Tired as he might feel, he was determined to continue to climb up the mountain.

11, D - The agreement which was signed yesterday ended six-month negotiation.

12, D - The book which my brother bought yesterday is very interesting.

13, B - In spite of the inability to speak English, Ngoc decided to settle in Manchester.

14, C - The demand for tea was so high in the 19th century that its price increased much.

15, A - He has been studying since 2 o’clock.

16, D - Mr. Pike thanked Mary for the surprising gift.

17, D- Willy accused Bob of stealing his best cassette 

18, B - You can’t phone him unless you have his number.