单项选择题

What can visitors do at the Maryland Science Center

A． Learn science by trying it out.
B． Watch and take part in a play.
C． Make gifts for their friends.
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单项选择题
Why did the boss send Mr. Black to China on business
[A] Mr. Black had never been to China before.
B. Mr. Black was an able and hardworking man.
C. Mr. Black could buy something interesting for Tony.
填空题
He She can drive a car.
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