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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 1991

—We're doing a lot to protect our environment, but it is not good enough. —So we should try______ to look after it.

A.hard B.harder C.hardest D.hardly
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—Weredoingalottoprotectourenvi