If farmers______so much of the prairie, the dust storms of the 1930s would not h

游客2025-02-04 52

问题 If farmers______so much of the prairie, the dust storms of the 1930s would not have been so severe.

选项 A、do not plow
B、have not plowed
C、had not plowed
D、will not plow

答案 C

解析 In this past unreal conditional sentence, had not plowed is the correct verb form in the condition clause.

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Iffarmers______somuchoftheprairie,theduststormsofthe1930swouldnoth