【題目】—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:—他們正在談?wù)摻o殘疾人們做些什么?—給他們提供更多的職位是必要的。That那個(gè);This這個(gè);It它;There那里。這句話使用的句型是It is +形容詞+to do sth.做某事是…的,其中it是形式主語,其他代詞不可以做形式主語,故選C。

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