单项选择题

NASA announced this week that it plans to （）.

A．develop a new spaceship
B．enlarge its research field
C．send astronauts to the moon
D．cut down its expenses in space research

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单项选择题
How many astronauts will be on board ？（）

A．2
B．3
C．4
D．5
单项选择题
When did NASA first sent astronauts to the moon ？（）

A．30 years ago
B．31 years ago
C．32 years ago
D．33 years ago
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