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

What can be inferred about the including Maine and Quebec during the early 1800s（）

A．The area was economically unified.
B．The authorities were unable to enforce law and order.
C．The two governments fought for control of the area.
D．Most of the people living there spoke only Frenc

单项选择题

What does the speaker say about the road between Main and Quebec（）

A．It was built by the Canadians.
B．It was built to facilitate trade.
C．The path for the road was extremely difficult to clear.
D．Hostilities between Canada and the United States caused construction delays