单项选择题

The room is in a terrible mess; it （）cleaned.

A．can’t have been
B．shouldn’t have been
C．mustn’t have been
D．will have been waiting

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You（）thedifficultiesafterIexplainthewholethingtoyou.

A．will be seen
B．will have seen
C．will see
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（）whoshewas,shesaidshewasMr.Johnson’sfriend.

A．asking
B．asked
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D．when asking
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