He began to work there ( )A.on his fifty B.at age of fifty C.when he fifty D.in his fifties

问题描述:

He began to work there ( )
A.on his fifty B.at age of fifty C.when he fifty D.in his fifties

b

D.in his fifties
50多岁

答案D
分析:
A.介词错误.
B修改为:at the age of fifty.在五十岁时
C修改为:when he was fifty.当他五十岁时
D in his fifties在五十多岁时.可以是五十一岁,也可以是五十九岁,有十年的区间.类似的用法有:in his thirties:在他三十多岁时
in 1990s 在二十世纪九十年代

选D
在他五十岁 in his fifties

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