单项选择题


A．upon
B．for
C．as
D．to
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单项选择题
It is a common theme in many science fiction stories that the world may one day be ______ by insects.
A．broken in
B．run over
C．taken over
D．filled in
单项选择题
The road is quiet. There ______ traffic even in the daytime.
A．isn't much
B．aren't many
C．is few
D．are little
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