A:Greeting each other with a smile is necessary in our daily life．B:It is necessaryto greet each other with a smile in our daily life．题目和参考答案——青夏教育精英家教网—

题目内容

1．A：Greeting each other with a smile is necessary in our daily life．
B：It is necessaryto greet each other with a smile in our daily life．

分析在日常生活中带着微笑彼此打招呼很有必要．

解答答案：It…to．原句的含义是：在日常生活中带着微笑彼此打招呼很有必要，而 It is adj for sb to do sth表示做某事对某人来说怎么样．本句中it是形式主语，后面不定式做真正主语，故答案是It…to．

点评本题考查的是同义句型的转换，平时多积累总结．

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