单项选择题

A．He spends too much money.
B．He bought an expensive watch.
C．He really does like television.
D．He should watch more television.
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erosion
单项选择题
The author says that in some hot and dry areas it is advisable to ________
A．build big lakes to store water
B．construct big pumping stations
C．build small and cheap irrigation systems
D．channel water from nearby rivers to cropland
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