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

A. mightn’tB. mustn’t

C. needn’tD. couldn’t

【答案】C

【解析】

試題分析：句意：我來新學(xué)校之前本沒有必要擔(dān)心，因?yàn)樵谶@里我的同學(xué)對(duì)我非常友好。needn’t have done本沒有必要做某事，表示實(shí)際上已經(jīng)做了某事。根據(jù)句意可知選C。本題考查情態(tài)動(dòng)詞。分析此題需抓住后句for my classmates here are very friendly to me.可知此處為本沒有必要做某事，mightn’t也許不；mustn’t不允許；couldn’t不可能。再根據(jù)句意可以選出正確答案。

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