问题
选择题
He ___ without saying good-bye to them, for he always has good manners.
A．mustn’t have left
B．may not have left
C．shouldn’t have left
D．can’t have left
答案
答案：D
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He ___ without saying good-bye to them, for he always has good manners.
A．mustn’t have left
B．may not have left
C．shouldn’t have left
D．can’t have left
答案：D