Do you play a musical ?- Yes I do. I started playing the piano when I was four. A.

问题补充：

--- Do you play a musical ?

--- Yes, I do. I started playing the piano when I was four.

A. engineer

B. gift

C. instrument

D. football

答案：

A. engineer

B. gift

(答案→)C. instrument

D. football

解析：考查情景交际和词义辨析。“你会演奏乐器吗？”“是的，我会。我4岁开始弹钢琴的。”A“工程师”；B“礼物，天赋”；C“仪器，乐器”；D“足球”。故选C。