1.I'm afraid we can't have coffee-there's ___left.
A.none B.nothing C.no D.no one
答案是A,C为什么不对?
应该填一个代词,“一点也没有了”,而no不是代词
2.I'm sorry to ___you,but can you tell me how to get to the library?
A.bother B.puzzle C.annoy D.worry
答案是A,D为什么不对?
D.worry是使人担心,不符合语境.整句话的意思是对不起,打扰了,所以选bother
3.---Mr Smith must know a lot about Chinese history.
---___.He has studied it for years.
A.So he does B.So does he C.So he must D.Yes, he must
答案是C,A为什么不行?
选C,意思是“那肯定啊”,must在这里作判断,A没有这个意思.