语法与词汇 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.
【正确答案】 C
【答案解析】句意： 亚马逊雨林中焚烧现象减少的受益者之一就是栗子产业。 因为烟雾会驱赶走昆 虫， 而昆 虫能为栗子树传粉， 使得栗子开始生长。 beneficiary受益人。