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.