保证答案准确率!
1.A
非限制性定语从句,one of which = one of the two cigarette ends
2.A
whether...or...意思是“无论/不管...还是...”,为让步状语从句
3.B
clear up 放晴
4.D
get across to sb 为某人所理解
5.D
BC句意不通,而A则动词须用单数needs
6.D
固定短语 wish you all the best,意思是“祝你万事如意”
7.C
meant to (buy some butter),意思是“（本）打算去...”
8.C
It's my pleasure.我很荣幸/不用谢.
9.C
ABD都不能加从句,只有except可以加that引导的从句
10.B
before用在此处的意思引申为“还没来得及...,就...”.
11.C
for one's own hand 为了个人的利益
put one's last hand to sth 对...做最后的润色