He has to finish the experiment today. He must be in the lab, ______?
A.mustn’t heB.won’t heC.doesn’t heD.isn’t he
D

試題分析:考查反意疑問句中尾句部分的助動(dòng)詞用法,must be結(jié)構(gòu)中的中心詞應(yīng)為be,且He must be in the lab相當(dāng)于I think he is in the lab,故其尾句部分為isn't he。
考點(diǎn):考查反意問句
點(diǎn)評(píng);表示猜測(cè)的情態(tài)動(dòng)詞的反意問句,不應(yīng)該用情態(tài)動(dòng)詞做反意問句,而是根據(jù)情態(tài)動(dòng)詞后面的動(dòng)詞來定。如情態(tài)動(dòng)詞+have done表示推測(cè),如果句中有過去時(shí)間,就用過去時(shí)的反意問句,如果沒有過去時(shí)間,就用現(xiàn)在完成時(shí)的反意問句。
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