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【题目】I ______ have worried before I came to the new school, for my classmates here are very friendly to me.

A. mightn’t B. mustn’t

C. needn’t D. couldn’t

【答案】C

【解析】

试题分析:句意:我来新学校之前本没有必要担心,因为在这里我的同学对我非常友好。needn’t have done本没有必要做某事,表示实际上已经做了某事。根据句意可知选C。本题考查情态动词。分析此题需抓住后句for my classmates here are very friendly to me.可知此处为本没有必要做某事,mightn’t也许不;mustn’t不允许;couldn’t不可能。再根据句意可以选出正确答案。

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