英语短文,答对给满分In a history clss,the teacher is asking Sam some q

英语短文,答对给满分
In a history clss,the teacher is asking Sam some questions,but he does't know any of them.The teacher decides to ask him a few easy ones.
"What is California?"she asks.
Sam thinks for a moment and answers,"A city"
"No,a state,"the teacher says and becomes a littel angry,But she tries not to show it."Who is the first president of the.U.S."she asks again.
Sam thinks for quite a long time,but says noting.The teacher gets very angry and says in a loud voice,"George Washington!"(The name of the first president of America)Sam then walks to his seat.
"Come back!"the teacher says,"I dont't tell you to go back."
"Oh,I'm sorry!"Sam says,"I think you are calling the next student."
1.In wbat class does the teacher ask Sam some questions?
2.Does Sam know the questions?
3.What's the teacher's second questiong?
4.Does Sam give the answer to the questiong?
5.Why does Sam go back to his seat?