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The student must be working very hard, ________?
A.doesn’t heB.mustn’t heC.needn’t heD.isn’t he
D               
             
试题分析:考查反义疑问句。句意:这个学生肯定努力学习,不是吗?若must表示推测,疑问部分不能用must,而应根据must后的动词结构采用相应的动词形式:He must be tired, isn’t he? 他一定累了,是吗?③ 当must用来表示对现在的情况进行“推测”时,反意疑问部分要根据must后面的动词采用相应的形式。 例:He must be good at maths, isn’t he? 他数学一定学得很好,是吗?所以选D项。
考点 : 考查反义疑问句
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