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【题目】—They are discussing what to do for the disabled.
— ___________is necessary to provide them with more positions.
A.That
B.This
C.It
D.There

【答案】C
【解析】句意:—他们正在谈论给残疾人们做些什么?—给他们提供更多的职位是必要的。That那个;This这个;It它;There那里。这句话使用的句型是It is +形容词+to do sth.做某事是…的,其中it是形式主语,其他代词不可以做形式主语,故选C。

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