题目内容

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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