Question

解释一下英语选择题 谢谢！

B 1______those books do you want?
a what are b which of c which are d what

C 2 all that can be done______.
a have been done b have done c has been done d has done

B 3______i knew him better, i discovered that my impression had been right.
a which b as c until d upon

C 4 all the afternoon he worked in his study with the door _____
a to lock b locking c locked d lock

D 5 he told her nothing,______upset her.
a that b for which c about which d which

答案在前面，帮我解释一下为什么选这项谢谢！

Answer 1

1 你想要的书是这些书中的哪几本，有选择性所以用which 然后 which of是固定搭配
2 所有能被做的已经被做了 所以用被动式 排除BD 又all that 被当作一个整体 所以用单数
3 只能用AS 其他的都讲不通
4 all the afternoon 这是一段时间 所以后面要用表状态的词即是状语 门被锁 用locked
5 这是非限定性定语从句，用which引导而不能用that, which upset her修饰前面的he told her nothing，意思是“他什么也没告诉她”这件事“使她很沮丧”。

Answer 2

1.which of那些书中的某一本
2.所有能做的都做了.主语是单数,被动
3.as表伴随状况,随着我越来越了解他
4.with+sth+动词过去分词,表示使某物保持某种状态
5.which引导的非限定性定语从名,which代表前面的整个句子.他什么都没有告诉她,这件事情让她很伤心.