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
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
C
试题分析：句意：我来新学校之前本没有必要担心，因为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。