The teacher asked Xiao Ming a joke. How much is 1 plus 1?

One day, the teacher asked Xiao Ming what one plus one equals. Xiao Ming said he didn't know. The teacher asked Xiaoming to go home and ask his family.

Xiao Ming asked grandpa, who was watching the news and said I killed someone!

Xiao Ming asked his father, who was reading a newspaper and said that the president of the United States was an Austrian zebra.

Xiao Ming asked his mother again. She was cooking and said to put some salt, vinegar and vitamins!

Xiao Ming asked his sister again, who was quarrelling with her and said that he had stolen my eraser!

Xiao Ming asked his younger brother, who was watching cartoons and said that the black-haired gorilla!

the next day

The teacher asked Xiaoming what one plus one equals, and Xiaoming said I killed someone!

Who does the teacher ask?

Xiao Ming, president of the United States, Austrian zebra!

Teacher, how did you kill him?

Xiao Ming, put some salt, vinegar and vitamins!

Teacher, why did you kill him?

Xiaoming, he stole my eraser!

The teacher took Xiaoming to the principal's office.

The headmaster asked angrily, do you know who I am?

Xiaoming black-haired gorilla!

headmaster ...