Read and choose读句子，选择适当的词填空，把序号填在题前括号内。
a: Yes, we do.
b: This is our classroom.
c: Forty.
d: Your school is cool.
e: Where is the canteen?
 

A: Welcome to our school. ____ 

B: How many students are there in your classroom?

A: ____ 
B: Do you have a library?

A: ____ 

B: ____ 
A: The canteen is on the first floor. 

B: ​​____