单项选择题

According to this passage, "Crew Exploration Vehicle" refers to

A．a space shuttle fleet
B．U.S.'s geopolitical strategy
C．a new spacecraft
D．a lunar station
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单项选择题
What should be the focus of NASA according to this passage
A．Research.
B．Industrial development.
C．Exploration.
D．National defense.
单项选择题
Which of the following four drivers can be defined as an illegal driver
A．A sixteen-year-old boy who drank a glass of wine three hours ago.
B．An old lady who took four shots of whisky in yesterday's party.
C．A policeman who likes alcohol very much.
D．A pregnant woman who drank three beers last night.
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