Judging from the fact that the other scouts haven’t arrived，they__________the bus.（）

If you__________a little longer at the party last night，you would have met the pop star.（）

A．have stayed
B．stayed
C．had stayed
D．would have stayed

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Greenspan is aware of these problems，but he doesn’t seem to believe there was any way he could have done__________about them.（）

A．anything
B．something
C．nothing
D．everything

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