At the concert next Saturday evening my brother is going to play ________. Now he is still practising.

A.a plano

B.pianos

C.the piano

D.piano

答案及解析： C

定冠词the常常可以与radio，telephone连用；也可以与乐器名词连用．例如：

①Last night We were listening to the radio.

昨天晚上我们在听收音机．

②When I got home my brother was talking on the phone.

我回到家里的时候，我兄弟正在打电话．