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.