Is ____ necessary to complete the design before National Day?A.thisB.thatC.itD.he-英语

题目简介

Is ____ necessary to complete the design before National Day?A.thisB.thatC.itD.he-英语

题目详情

Is ____ necessary to complete the design before National Day?
A.thisB.that C.it D.he
题型:单选题难度:偏易来源:不详

答案

C 
it作形式主语,代指后面的不定式。

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