The students were having a class on a cold morning in winter.
The teacher (11) with his back to the fire. He wanted to
give (12) to the students before he (13)
his lesson. The teacher (14) to his students,
"Before you speak, think. (15) fifty before you say anything
important... a hundred ff it is very important." At that time, the teacher’s
coat tails caught fire, and the teacher didn’t know, but the students saw it at
once. And they didn’t tell him about it.