C1661 Stimulus

In the afternoon, since there was no operation scheduled, he prepared the lessons for the class.

He had almost used up all the things he had prepared before. There was still half of the term left.

The whole room was quiet. The April sun shone warmly through the window, bringing with it an afternoon peace.

Each of them did their own work.

A huge bang rang out, startling everyone.

Unknowingly