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 |
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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 leave | C．shouldn’t have left | D．can’t have left |
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