根据短文内容，判断正（T）误（F）。

       There are eighteen boys and twenty-five girls in our class. One of the boys is English. His name is Tom. He is thirteen. Two of the girls are American. They are twins. Their names are Jane and Joan. They are twelve. They are my friends. All of the other boys and girls are Young Pioneers. We all Chinese students like the English boy and the American girls, and they like us, too. We help each other.

（       ）1. In our class there are forty-three students.

（       ）2. The twin sisters are form England.

（       ）3. Joan is twelve, and Tom is thirteen.

（       ）4. All the students in our class are Young Pioneers.

（       ）5. We help American and English students and they help us.