单项选择题

A．Air traffic conditions.
B．Traffic jams on highways.
C．Road conditions.
D．New traffic rules.
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单项选择题
Space policy is dominated by politics.
A．Y
B．N
C．NG
单项选择题
A．The man used to live in the city.B．The library uses computer systems.C．The woman is ready to help.D．The man is confident of his computer skills.
A．The man used to live in the city.
B．The library uses computer systems.
C．The woman is ready to help.
D．The man is confident of his computer skills.
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