根据所听的问句,选出正确的答句,读两遍。(10分) ( )(1)A. I’m a teacher. B. He’s a doctor. C. She’s a nurse. ( )(2)A. Yes,they are. B. No,there aren’t. C. Yes,there is. ( )(3)A. It’s on the second floor. B. It’s in the sitting room. C. They’re on the first floor. ( )(4)A. He’s a policeman. B. No,he isn’t. C. Yes,he does. ( )(5)A. There are some boys in the classroom. B. There are twenty-one. C. No,there aren’t.