题目内容
3． is important for us to eat a balanced diet．（ ）| A． | It | B． | This | C． | That | D． | It's |
分析 对我们而言平衡饮食是重要的．
解答 答案：A．
根据--is important for us to eat a balanced diet，可知句子考查了It is adj for sb to do sth对某某来说做某事是怎么样的，动词短语作主语可用形式主语it来表示，真正主语位于句尾用动词不定式to do，故选A．
点评 本题考查了形式主语的有关用法．解答时注意：It is adj for sb to do sth对某某来说做某事是怎么样的．
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