1, the classroom is very quiet, the students are doing their homework, as if they heard the rustling of silkworms eating mulberry leaves.

2. Quiet in the classroom is like walking into a world without sound!

The classroom is as quiet as if the air is condensed and there is no sound.

The classroom is so quiet that you can even hear the rustling of pencils.

The classroom is so quiet that you can hear a pin drop on the ground.

6. The students are unusually quiet. I heard the faint tick of the teacher's watch.

7. In the middle of the night, the classroom is as quiet as a forest, a little scared.

8. There is silence in the classroom, so quiet that you can hear clearly when a pin falls!

9. There was silence in the classroom, and the ticking of several students' watches was clearly discernible. I'm very nervous.

10, the classroom was silent, and I seemed to clearly hear the rhythmic breathing of the classmate in the southeast corner.

1 1. It was as quiet as if time had stopped. It seems that one action can break this calm.

12, there is only the sound of the pen touching the paper in the classroom.