单项选择题

The substance can be added to gasoline to accelerate the speed of automobiles.

A．quicken
B．shorten
C．loosen
D．enlarge
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单项选择题
We should contemplated the problem from all sides.
A．deliberated
B．thought
C．described
D．designed
单项选择题
Smoking is inhibited in public places.
A．instructed
B．inquired
C．forbidden
D．strived
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