Dry fanning is a type of agriculture used in areas______less than 20 inches of r

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问题 Dry fanning is a type of agriculture used in areas______less than 20 inches of rainfall.

选项 A、there are
B、where there is
C、in which is
D、which has

答案 B

解析 句意:旱作农业是一种在降水量不足20英寸地区所采用的农业方式。题干中先行词为areas,表示地点,因此用关系副词where或in which来引导定语从句。定语从句中使用there be句型,表示存在。
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