Question

【题目】Alibaba CEO Jack Ma has decided to retire from his company in his _________．

A. fiftyB. fiftiesC. fiftiethD. fiftieths

Answer 1

【答案】B

【解析】

句意：阿里巴巴CEO马云已经决定在他50多岁从他的公司退休．fifty50（基数词）；fiftieth第50（序数词）；fifties用于in one’s fifties“在某人50多岁时”，根据句意可知，表示“在他50多岁时”，故选B。