lǎo / shī / zhǔn / bèi / jiǎng / jiě / zhè / ge / wèn / tí / xué / sheng / men / dōu / xǐ / ěr / gōng / tīng

老师准备讲解这个问题，学生们都洗耳恭听。

The teacher was about to explain the issue, and the students listened attentively.