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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 636

In order to know how heavy the elephant was, he wrote down the weight of each stone and then           ____all the weights.

A.packed up B.added up C.went through D.set down
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Inordertoknowhowheavytheelepha