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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 392

In addition to the farming they ______ since the 1990s, the Smiths have started a small business.

A.have done B.had been done
C.were doing D.have been doing
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Inadditiontothefarmingtheysinc