单项选择题

Passage Two
Questions 29 to 31 are based on the passage you have just heard.

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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单项选择题
A．They must arrange the meeting place well in advance.B．They can postpone fixing the place till last minute.C．They needn’t decide when and where to meet.D．They still have to work out detailed meeting plans.
A．They must arrange the meeting place well in advance.
B．They can postpone fixing the place till last minute.
C．They needn’t decide when and where to meet.
D．They still have to work out detailed meeting plans.
单项选择题
The author compares ______ of the online sale to the effect of neutron bomb attack.
A．the efficiency
B．the choice
C．the price
D．the service
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