All other doors were looked,including the door to the reading room where I ___something useful.
All other doors were looked,including the door to the reading room where I ___something useful.
A.could have found B.could find
C.would D.must have found
A.could have found B.could find
C.would D.must have found
其他人氣：623 ℃時(shí)間：2020-06-21 01:13:36
優(yōu)質(zhì)解答
應(yīng)該是all the doors were locked吧.選B,排除法,could have done表示原本可以做某事,但結(jié)果沒做成.must have done是命令語(yǔ)氣,表示某人必須做某事.C根本沒動(dòng)詞所以不選.B用could是因?yàn)榍懊嬗玫囊彩沁^(guò)去式.
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