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A．By forcing them farming.
B．By affecting the quality of soils.
C．By adding chemicals and pollute the waterways.
D．By affecting the environments they live in.
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单项选择题
In his book Philosophy of Boredom , Lars Svendsen examines the origin of boredom, its history, how and why it afflicts us, and how to overcome it.
A．Y
B．N
C．NG
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