Question

【题目】Li Yundi started to play piano when he was 7. And he became famous all over the world at age of 17.

A. the; the B. the; an C. \; the D. \; an

Answer 1

【答案】A

【解析】句意：李云迪7岁开始弹钢琴。他在17岁时世界著名。play the piano弹钢琴；at the age of在……岁时，故选A。