【题目描述】
The room is in a terrible mess; it ______ cleaned.A.mustn't have been
B.shouldn't have been
C.can't have been
D.wouldn't have been
【我提交的答案】: A |
【参考答案与解析】: 正确答案:C |
解析:对过去否定的推测用“can't have+过去分词”。
是不是有个说法,肯定用must,否定用can’t?
第10题
以食少、腹胀、便溏及气虚症状为主要表现的病证是
A.脾虚气陷
B.脾气虚
C.脾阳虚
D.寒湿困脾
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