2. 专升本
  3. Agriculture was a step in human progress _______which subsequently there was not anything comparable until our own machine age.

Agriculture was a step in human progress _______which subsequently there was not anything comparable until our own machine age.

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问题 Agriculture was a step in human progress _______which subsequently there was not anything comparable until our own machine age.
选项 A、in
B、for
C、to
D、from
答案C
解析
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