选A 是正确的,因为：
We主语 must have been表推测的系动词部分drunk形容词作表语 last night时间状语
如果是事实,就说：We were drunk last night,weren't we?
We must have been drunk last night,_____?A.weren't we B.mustn't we C.hadn't we D.didn't we
We must have been drunk last night,_____?A.weren't we B.mustn't we C.hadn't we D.didn't we
老师说 选D 但为什么不选A啊?
老师说 选D 但为什么不选A啊?
英语人气：433 ℃时间：2019-08-21 17:18:04
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