中考英语试题 改为同义句
问题描述：
中考英语试题 改为同义句
Meeting each other with a smile is necessary in our daily life.改为同义句
------ ------- to meet each other with a smile in our daily life.
答
It'snecessary__________
这是一个形式主语的结构（初中）为 It's +adj. （形容词）+for sb. to do sth.