It _______ thest rare books that have benn stolen from the library.A was B were C are D isIt _______ these rare books that have been stolen from the library.A was B were C are D is句子也打错了，不好意思
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It _______ thest rare books that have benn stolen from the library.A was B were C are D isIt _______ these rare books that have been stolen from the library.A was B were C are D is句子也打错了，不好意思
It _______ thest rare books that have benn stolen from the library.
A was B were C are D is
It _______ these rare books that have been stolen from the library.
A was B were C are D is
句子也打错了，不好意思
It _______ thest rare books that have benn stolen from the library.A was B were C are D isIt _______ these rare books that have been stolen from the library.A was B were C are D is句子也打错了，不好意思
选D.
这道题考察的是强调句式：It is/ was + 被强调部分+ that + 其他
强调句式要注意的有以下几点：
1.形式上,It is/ was ……that ……中,is/ was 只有这两种时态,由本句话的时态来决定是用is还是was,不存在are或were的形式；
2.当被强调部分是主语并且是人时,that可以换成who
e.g.It was Tom who/ that picked up a book on the playground.
3.主谓一致方面：如果被强调部分是主语,谓语由该主语决定,不受其他影响
e.g.It is I who am to blame for the matter.
这道题考察的是第一个知识点.
D, It is that...句型，be动词的时态由that后面的时态决定。
is 这句子是考察强调句形 it is/was +强调部分+that+句子. 因句子中用的是现在完成时所以要用is