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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 容易
  • 浏览 1427

They can surely overcome those difficulties ___ they are closely united.

A.even if B.as long as C.so long as D.B and C
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Theycansurelyovercomethosediff