答案D
分析：
A.介詞錯(cuò)誤.
B修改為：at the age of fifty.在五十歲時(shí)
C修改為：when he was fifty.當(dāng)他五十歲時(shí)
D in his fifties在五十多歲時(shí).可以是五十一歲,也可以是五十九歲,有十年的區(qū)間.類似的用法有：in his thirties:在他三十多歲時(shí)
in 1990s 在二十世紀(jì)九十年代
He began to work there ( )
He began to work there ( )
A.on his fifty B.at age of fifty C.when he fifty D.in his fifties
A.on his fifty B.at age of fifty C.when he fifty D.in his fifties
英語人氣：981 ℃時(shí)間：2020-04-13 05:09:58
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