题目

He can hardly stay awake because he is so tired, _______?A. does he                                 B. isn’t heC. can’t he                                 D. can he 答案：D  句中关键词hardly（几乎不）表否定含义，根据反意疑问句“前肯后否，前否后肯”的原则可排除B、C两项；由主句中的情态动词can可知选D。

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