Weweretoldthat

问题详情：

 We were told that ______ when Marx was already _______, he started to learn Russian.

  A. in 1840’s; in his fifties             B. in the 1840’s; his fifties

  C. in the 1840’s; in his fifties          D. the 1840’s; in his fifties

【回答】

C

知识点：介词

题型：选择题