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3.He can hardly stay awake because he is so tired.______?(  )
A.does heB.isn't heC.can't heD.can he

分析 他很难保持清醒因为他是如此的劳累.是不是?

解答 句意:他很难保持清醒因为他是如此的劳累.是不是?前文hardly表示否定含义,后附加部分用肯定.前有情态动词can,后附加疑问句用can he.故选:D

点评 反意疑问句一般遵循前肯定则后否定,前否定则后肯定的原则,并且疑问部分时态,人称要与前文保持一致.

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