单项选择题

Section B

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．wouldn’t have been

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The activity was delayed，（）was exactly（）we wanted

A．whicll, what
B．which，which
C．that，what
D．that，that
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By the time your plane lands tonight，I （） at the airport for 3 hours.

A．had waited
B．have been waited
C．had been waiting
D．will have been waiting
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