单项选择题

A．At a booking office.
B．In a Hong Kong hotel.
C．On a busy street
D．At an airport.
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单项选择题
A．Travel on May 19 as planned.B．Wait for a cheaper fare.C．Stay an extra day in Atlanta.D．Return on Sunday.
A．Travel on May 19 as planned.
B．Wait for a cheaper fare.
C．Stay an extra day in Atlanta.
D．Return on Sunday.
单项选择题
As indicated in the passage, the water problem ________.
A．is already serious in certain parts of the world
B．has been exaggerated by some experts in the field
C．poses a challenge to the technology of building reservoirs
D．is underestimated by government organizations at different levels
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