I think he must be writing his essay at home now, ______?
A.is heB.isn’t heC.do I D.mustn’t he
B

試題分析:考查反義疑問(wèn)句。本題中有一個(gè)省略部分I think,當(dāng)句子有情態(tài)動(dòng)詞表示推測(cè)的時(shí)候,如果有現(xiàn)在時(shí)的時(shí)間狀語(yǔ),就對(duì)現(xiàn)在時(shí)進(jìn)行反問(wèn)。本題中有Now,主句有be動(dòng)詞,故就對(duì)系動(dòng)詞Be進(jìn)行反問(wèn),故B正確。句意:我認(rèn)為現(xiàn)在他一定在家寫論文,不是嗎?
點(diǎn)評(píng):反義疑問(wèn)句,要注意對(duì)主句的語(yǔ)義的正確理解,還要注意主句是否是表示推測(cè)還虛擬,是否有時(shí)間狀語(yǔ)的影響。
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