四六级考试

试题来源：专业四级-186
【单选题】 _________, meteorologists hope to learn how to keep its damage to a minimum.
A．Lightning studied by
B．Lightning is studied by
C．The study of lightning
D．By studying lightning

参考答案：D
网考网解析：
[汉译] 气象学家希望通过对闪电的研究，将其危害控制到最低点。 [注释] “by+分词”结构做方式状语。例如：She ... 查看试题解析出处>>