单项选择题

Questions 11 to 18 are based on the conversation you have just heard.

A．There is a flood every two years.
B．The flood is the worst ever since fifties.
C．There is a serious drought.
D．There is a severe flood.
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单项选择题
A．The ice was cut and handled with the help of some special tools.B．The ice was taken from the flowing river with hooks and carried by sleds to icehouses.C．The ice was carried on the frozen, surface of the pond or river.D．The ice was sawed into even blocks by workers.
A．The ice was cut and handled with the help of some special tools.
B．The ice was taken from the flowing river with hooks and carried by sleds to icehouses.
C．The ice was carried on the frozen, surface of the pond or river.
D．The ice was sawed into even blocks by workers.
单项选择题
A．By using satellite images, maps, etc.B．By studying specific {arming methods.C．By studying the variation of human population.D．By analyzing the quality of crops.
A．By using satellite images, maps, etc.
B．By studying specific {arming methods.
C．By studying the variation of human population.
D．By analyzing the quality of crops.
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