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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 较易
  • 浏览 783

They often change the kind of crop in each field ____ few years, for example, growing corn or wheat and then the next year peas or soybeans.

A.every B.a C.each D.some
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Theyoftenchangethekindofcropin