单项选择题

A．At home.
B．In a telephone booth.
C．At a meeting.
D．In the hospital.
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单项选择题
A．His generous suggestions and help.B．His imprisonment in World War I.C．The responsibility of helping others.D．His impact on Western civilization.
A．His generous suggestions and help.
B．His imprisonment in World War I.
C．The responsibility of helping others.
D．His impact on Western civilization.
单项选择题
In order to prepare for the Apollo missions, NASA and Black & Decker developed a new kind of ______.
A．fuel
B．drills
C．oxygen system
D．landing vehicles
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