lǎo / shī / zǒu / jìn / jiào / shì / hòu / yuán / běn / chǎo / nào / de / xué / shēng / dōu / hé / huì / le

老师走进教室后，原本吵闹的学生都合喙了。

When the teacher entered the classroom, the students who had been making noise all fell silent.