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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 528

_______,when Marx was already _______,he found it was important to study the situation in Russia, so he began to learn Russian.

A.In 1870s, in his fifties
B.In 1870s, in fifties
C.In the 1870s, in fifties
D.In the 1870s, in his fifties
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