阅读短文，根据短文内容选择所给问题的答案。

Dear friends,

My name is Tony. I am English. I am twelve years old this year. I am tall, and I am good at playing football. I am in Grade Seven. There are thirty boys and twenty girls in my class. We are learning Chinese in our school. Our Chinese teacher is Mr. Wu. He is a little short, but he is very strong. He is very nice to us. I have some good friends in my class. Tom is a tall boy and has short black hair. He is good at playing football, too. Alice is short and she loves wearing red dresses. She is good at English. Shelly has long hair. She can speak Japanese and she likes swimming. We all study hard.

What about your school and your friend?  Please write soon.

Yours,

Tony

小题1:Which country is Tony from?

A．America.

B．England.

C．China.

D．Japan.小题2:Who is Mr. Wu?  

A．He is Tony’s English teacher.

B．He is Tony’s father.

C．He is Tony’s friend.

D．He is Tony’s Chinese teacher.小题3:How many students are there in Tony’s class?

A．50.

B．30.

C．20.

D．52.小题4:Who likes swimming?

A．Tom.

B．Alice

C．Shelly.

D．Mr. Wu.小题5:Who writes this letter?

A．Tony

B．Tom.

C．Shelly.

D．We don’t know.

助焊剂的主要作用是（）和保护电路板不受损伤。

A、阻止焊接

B、连接元件

C、防止高温

D、湿润