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The work is too hard for him. He__________ finish it on time.
A．can'tB．mustn'tC．shouldn'tD．needn't
A
情態(tài)動詞的考察 句意為“這工作對他來說太難。他不可能按時完成”。 can't 用在否定句中表示“不可能”； mustn't“絕對不能，禁止”； shouldn't “不應該”needn't“不必”
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