单项选择题

The old man repented that he ______idle when young.

A．has been
B．having been
C．had been
D．have been
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单项选择题
If he ______to the gate last night, I would have given him the letter.
A．would come
B．comes
C．had come
D．come
单项选择题
If I ______you, I would go to the party with her.
A．am
B．were
C．had been
D．lie
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