单项选择题

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

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单项选择题
He told me how he had given me shelter and protection without which I （） of hunger and cold.

A．would be died
B．would have died
C．would die
D．will have died
单项选择题
No matter how frequently （）, the works of Beethoven always attracts large audience.

A．performing
B．performed
C．to be performed
D．being performed
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