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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 较易
  • 浏览 498

So, ________ the government has a good system of control or can educate the people, the forests will slowly disappear.

A.as long as B.when C.unless D.every time
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相关知识点

So,thegovernmenthasagoodsystem