--- He has to finish the experiment today. He must be in the lab, ? ---That s qu
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--- He has to finish the experiment today. He must be in the lab,____?
---That s quite possible.
A. mustn't he B. won't he C. doesn't he D. isn't he
试题答案
D
解析:
该题考查反意疑问句中尾句部分的助动词用法，must be结构中的中心词应为be，且He must be in the lab相当于I think he is in the lab，故其尾句部分为isn't he。