单项选择题

How many astronauts will be on board ？（）

A．2
B．3
C．4
D．5

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热门试题

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

单项选择题

What is one reason Canadians began to immigrate to Maine during the 1800s ？（）

A．Maine was less influenced by the French government.
B．Maine had better employment opportunities.
C．Maine was politically stable.
D．Marine had a better climat