我的朋友叫Cho，他是一名优秀的钢琴家。

My friend ___Cho is an excellent pianist.

我早餐喜欢吃一块巧克力。

I like having a piece of ___chocolate for breakfast.

玩具火车沿着轨道行驶时发出'呜呜'的声音。

The toy train went '___choo ___choo' as it moved along the tracks.