题目内容
4．嬉笑处于困境的人是不礼貌的．It is impolite to laugh at people who are in trouble．
分析 根据汉语语意可提炼为"做某事是怎么的"由于"嬉笑处于困境的人"做主语太长，故采用it is adj to do sth．结构，it作形式主语，真正的主语为to do sth..处于困境中的人，需用定语从句来修饰，且人做主语，需用关系代词who或that．
解答 答案：It is impolite to laugh at people who are in trouble
点评 考查当主语太长时使用it is adj to do sth．及定语从句的使用．考生能够判断出使用该结构是做题的关键．
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