Question

【題目】——I called you last night, but no one answered.

——Sorry, I____________ sleeping.

A.need have beenB.would have beenC.must have beenD.should have been

Answer 1

【答案】C

【解析】

考查情態(tài)動(dòng)詞+have done。句意：——我昨晚給你打電話了，但沒(méi)人接。——對(duì)不起，我一定是睡著了。這里在對(duì)過(guò)去的一件事情進(jìn)行推測(cè)。固定結(jié)構(gòu)：must have done表示對(duì)過(guò)去事情有把握的肯定推測(cè)。故選C。