首页 > ______is estimated that a round-trip to Mars would take more than a year.A,That B,what C,There D,It-

______is estimated that a round-trip to Mars would take more than a year.A,That B,what C,There D,It-

题目简介

______is estimated that a round-trip to Mars would take more than a year.A,That B,what C,There D,It-

题目详情

______is estimated that a round-trip to Mars would take more than a year.
A,That B,what C,There D,It

题型：单选题难度：中档来源：不详

答案

D

试题分析：通过分析句子结构，可知句子的真正主语是that引导的主语从句，这里需要形式主语，故用it。
点评：动词不定式，动名词或主语从句作主语时，通常把它们放在谓语动词前，而用it作形式主语，放到句首。

上一篇 : _____ was most important to
下一篇 : 短文改错。 As student of you

更多内容推荐