What's so funny?

The teacher found a cigarette butt in the dormitory, so he called eight students in the dormitory to the office for interrogation.

[Act I]

Teacher: To be honest, do you smoke?

Boy a: no.

Teacher: No? Well, French fries, please.

A naturally stretched out two fingers and took it. ...

Teacher: Is this still called smoking? Call your parents. ...

[Act II]

Teacher: Do you smoke?

Boy b: no.

Teacher: No? Well, French fries, please.

B took the French fries carefully with her palm, because she heard about A.

Teacher: Aren't you going to dip in some ketchup?

B accidentally dipped too much, so he immediately flicked it with his finger. ...

Teacher: The posture of playing ash is very skillful. Call your parents ...

[Act III]

Teacher: Do you smoke?

Boy c: no.

Teacher: no, ok, I'll have French fries.

Because of the first two examples, C carefully finished the French fries with sweat.

Teacher: Aren't you going to take a root home for your classmates?

C picked up the French fries and put them in his ear. ...

Teacher: No? Call your parents ...

[Act IV]

Teacher: Do you smoke?

Boy d: no.

Teacher: Good. Have a French fries.

Eating French fries in fear.

Teacher: Aren't you going to take a root home for your classmates?

D carefully put the chips in his upper pocket again.

The teacher suddenly shouted: The headmaster is coming!

D quickly took French fries out of his pocket and threw them on the ground, stepping on them with his feet. ...

Teacher: No? ! Call your parents ...

[Act V]

Teacher: Do you smoke?

Boy e: no,

Teacher: Good. Have a French fries.

E just took French fries, and the teacher said, won't you invite me to eat?

E hurriedly handed me the French fries with both hands and then took out a lighter. ...

Teacher: No? ! Call your parents ...

[Act VI]

Teacher: Do you smoke?

Boy f: no.

Teacher: Good. Have a French fries.

I ate it in fear.

Teacher: Suddenly shouted: The headmaster is coming!

F sweaty palms, but still calmly bowed his head and said, hello, headmaster!

Teacher: The headmaster will smell your mouth.

F takes out the French fries: No, they are still there. The fire hasn't lit yet.

Teacher: ...

[Act VII]

Teacher: Do you smoke?

Boy G: I swear to God, I will never smoke again.

Teacher: You really don't smoke? Ok, let's have a French fries.

G naturally took the French fries and ate them clean.

Teacher: That's a good boy. What brand of French fries do you usually like?

(proudly): Greater China ...

[Act VIII]

Teacher: Have a portion of French fries.

Me: No thanks.

Teacher: ...

This is very interesting.