阅读理解。
Jack is a teacher of English. He is not young, but he is not old. He has a round face and a big nose. He is tall. There are fifty students in his class. They all like him.
Now it’s in the afternoon. Look, some students are working in the classroom. Jack is there,too. He’s helping them to study English. He is a good teacher, and he is a good friend of them all.
（1）What dose Jack do?
A. He is a worker.
B. He’s a teacher.  
C. He’s a doctor.
D. He’s nurse.
（2）What dose he look like?
A. He has a round face and a big nose and he is tall.
B. He is short and fat.
C. He has a small nose.
D. He has a long face.
（3）How many students are there in his class?
A. There’s fifteen students in his class.
B.There’s fifteen.
C. He has fifteen.
D. There are fifty in it.
（4）What are the students doing in the classroom?
A.They are working there.   
B. They’re doing their lessons.
C. They’re helping their teacher.
D.They’re good friends of Jack.
（5）Is Jack a good teacher?
A. Yes,he does.
B. No, he isn't.
C. Yes,he is.
D. No, he doesn't.