The main purpose of this article is to ______. Farmers use chemicals and fertilizers in order to ______.

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问题 The main purpose of this article is to ______.
Farmers use chemicals and fertilizers in order to ______.

选项 A、improve their working conditions
B、increase the yields of their crops
C、provide their crops with more vitamins and minerals
D、improve the quality of goods grown in commercial farming areas

答案B

解析
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