Let’s ask John to play piano for the party.A. /B. aC. anD. the

问题补充：

Let’s ask John to play piano for the party.

A. /

B. a

C. an

D. the

答案：

A. /

B. a

C. an

(答案→)D. the

解析：piano“钢琴”是乐器。当play与乐器连用时，应该加上the。所以本题选D。