He without saying good-bye to them, for he always has good manners.A．mustn’t have leftB．may not leaveC．shouldn’t have leftD．can’t have left 题目和参考答案——青夏教育精英家教网—

题目内容

He _____ without saying good-bye to them, for he always has good manners.

A．mustn’t have left

B．may not leave

C．shouldn’t have left

D．can’t have left

解本题一定要注意审题，要把题目看完整，才不会想当然选C，根据后文的for he always has good manners可以断定“他不可能不打招呼就离开”，用can’t have left.

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