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need→needed
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单项选择题
A．It might increase airport capacity.B．It might lower property values.C．It might lead to effective modification of existing jet engines.D．It might cause more transportation costs to and from airports.
A．It might increase airport capacity.
B．It might lower property values.
C．It might lead to effective modification of existing jet engines.
D．It might cause more transportation costs to and from airports.
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According to the passage, a winter midnight is most probably the time for ______.
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