[请教]高二英语单选题

题目

[请教]高二英语单选题
1.She_____the book sometime in the past,or she ____the question so well.
A.must have read; couldn't have answered
B.must read; couldn't have answered
C.must have read; couldn't answer
D.must have read; can't answer
2.We are going to discuss the way of reading works____it is used for real life purpose,and this should give you a better understanding of it.
A.that
B.which
C.where
D.when
请达人解析一下以上两道题,并选出正确答案.

答案

A
她一定读过
读过才知道,读是完成的动作,用完成的must have read
否则,她不可能回答地这么好.她回答了吗?回答了,而且很好地回答过了,“她不可能回答地这么好”得用虚拟的
用couldn't have answered表示一种虚拟语气
"it" is used for real life purpose
晕 从句什么都不缺啊.只能选where and when
C 在现实生活（什么地方）的应用好还是 什么时候在现实生活应用
选C 好