题目内容
5.________is dangerous for us to swim in the river alone.( )| A. | It | B. | That | C. | This |
分析 独自在河里游泳对我们来说很危险.
解答 答案:A.根据is dangerous for us to swim in the river alone,可知这里考查了It is+形容词+for sb+to do sth.对某人来说做某事怎么样,it为形式主语,动词不定式才是真正的主语.故选A.
点评 首先要掌握it作形式主语在前面,主语从句放在后面的这种句式,然后根据具体的题意做出正确选择.
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