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题目
题型:不详难度:来源:
There is no bridge or boat. It’s difficult for people_____the river
A. cross    B.to cross    C. crossing
答案
B
解析

试题分析:句意:没有桥和船,对人们来说过河是困难的。It作为形式主语,to cross作文真正的主语,故选B.
点评:It用作实词表达以下概念:指代前文提到的事物,前文中的this, that;替代前文中的内容;指代一位性别不明的小孩或未知的人;指代未指明但谈话双方都知道的那件事;指代时间、天气、气候、距离等自然现象。it还可以作为形式主语代替后面的不定式或是从句作为真正的主语。常构成it is +adj+for/of sb to do sth的句型。
核心考点
试题【There is no bridge or boat. It’s difficult for people_____the riverA. cross    B】;主要考察你对分词等知识点的理解。[详细]
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