One of the first ______ of reduced burning in Amazon rain forests was the chestnut industry: smoke tends to drive out the insect

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问题 One of the first ______ of reduced burning in Amazon rain forests was the chestnut industry: smoke tends to drive out the insect that, by pollinating chestnut tree, allow chestnuts to develop.

选项 A、reformers
B、discoveries
C、casualties
D、beneficiaries

答案D

解析
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