阅读理解。 I'm Chinese. My name is Zhang Tiantian. I'm thirteen. I'm in Class 7, Grade 7. I have a good friend at school. He is from the United States. His name is Jeff. He is in Class 7, Grade 7, too, but he's twelve. Our English teacher is Miss Ouyang. She is a good English teacher. 根据短文内容，判断下列句子的正（T）、误（F）。 (     )1. I'm twelve, and my friend is thirteen. (     )2. I'm in Class 1, Grade 7. (     )3. My friend isn't Chinese. (     )4. My friend is in Class 7, Grade 7. (     )5. Our English teacher is a man.