You have to book the tickets five days ______ advance.

If you are interested in this line（) thinking,please read this book for more details.

【题目描述】

21. Would you please pass me the book ________ cover is black？

A) which

B) whose

C) that

D) its

【我提交的答案】： A

【参考答案与解析】： 正确答案：B

答案分析：

【我的疑问】（如下，请求专家帮助解答）

为什么选B呀

A.were

B.been

C.gone

D.was

You have nothing to __________ by refusing to listen to our advice.

A) gain B) grasp C) seize D) earn

You don’t have to be in such a hurry, I would rather you _______ on business first.

A) would go B) will go C) went D) have gone

A.at

B.of

C.in

D.on

er you _______ on business first.

A) would go B) will go

C) went D) have gone

You should have been more patient ________ that customer; I’m sure that selling him the watch was a possibility.

A) of B) with C) for D) at

A.for

B.on

C.in

D.at

but you ________ it.

A) mustn’t have done B) wouldn’t have done

C) mightn’t have done D) didn’tave to do