题目内容

You have already tried your best, so you _____worry too much about the exams.
A．can’tB．needn’tC．mustn’tD．shouldn’t
B

这题考查情态动词的用法，can’t不能needn’t不必mustn’t不应当shouldn’t不应该。句意是：你已经尽力了，没必要担心考试。选B.
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