2 sentences

1. 他在学吹口琴。

   tā zài xué chuī kǒu​qín.

   He is learning to play the harmonica.

   Source: Dong Chinese Dictionary

2. 这个口琴的簧坏了，吹不出声音。

   zhè​ge kǒu​qín de huáng huài le, chuī bù chū shēng​yīn.

   The reed of this harmonica is broken, so it makes no sound.

   Source: Dong Chinese Dictionary