When farmers______their crops with chemicals, excess phosphorus can wash into ri

游客2025-02-04 29

问题 When farmers______their crops with chemicals, excess phosphorus can wash into rivers and lakes.

选项 A、fertile
B、fertilize
C、fertilization
D、fertility

答案 B

解析 The first clause needs a verb: fertilize.

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Whenfarmers______theircropswithchemicals,excessphosphoruscanwashintori