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 pan in a play.
C．Make gifts for their friends.
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单项选择题
By calling (410)685-2370 we can get information about ______.
A．the night sky show
B．books and games
C．group price tickets
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.
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