题目内容
14．我们很有必要提前两周定上海世博会的门票．It is quite necessaryfor us to book the tickets to Expo Shanghai two weeks ahead of time．
分析 It； for
解答 答案：It； for
根据句子汉语意思可知句中表达的是"对某人来说做某事怎么样"结合所给英语句子，故用句型"It is+形容词+for sb+to do sth"，其中it作形式主语；通过比对可知句中缺少形式主语it，及人称代词前的介词for，句中首字母大写．故答案为It； for
点评 本题掌握It is+形容词+for sb+to do sth表达的是"对某人来说做某事怎么样"是答题的关键
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