单项选择题
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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
Which of the following is the best title for the passage
A.African Elephants and the Ivory Trade.
B.A Bid to Save the Elephant.
C.The Poachers.
D.Elephants in Danger.
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