KarlMarxbegantolearnRussian___

发布时间：2020-07-28 15:05:11

Karl Marx began to learn Russian ________．We should learn from him．A.at his fiftyB.in his fiftyC.at his fiftiesD.in his fifties

网友回答

D解析in his fifties意为“在他五十多岁时”。
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