【題目】I believe that she must have been at home last night, ________?

A. didn’t she B. wasn’t she C. mustn’t she D. needn’t she

【答案】B

【解析】考查反義疑問(wèn)句。句意：我相信她昨晚一定是在家，不是嗎? 如果主句謂語(yǔ)是think, believe, expect, suppose, imagine等引導(dǎo)的賓語(yǔ)從句，疑問(wèn)部分與賓語(yǔ)從句相對(duì)應(yīng)構(gòu)成反意疑問(wèn)句。賓語(yǔ)從句中must have been是對(duì)過(guò)去事實(shí)的推測(cè)，反問(wèn)時(shí)按been的過(guò)去時(shí)反問(wèn)，故選B。

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