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.