单项选择题

It was clever ______ at the answer in two minutes.

A．of him to arrive
B．for him to arrive
C．for his arriving
D．of his arriving

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单项选择题

A．things
B．materials
C．substances
D．objects

填空题

Caller: Is this the Animal Defense LeagueAnswerer: （） Sorry, I think you have the wrong number.

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