Read and choose.(从B中选择合适的答案回答A中的问题

( )1. Let's go to the library.

( )2. Where is the teacher's office?

( )3. Do you have lunch at school?

( )4. How many desks are there in your class?

( )5. Is that your pencil?

A. Yes, I do.

B. Yes, it is.

C. Forty-six.

D. OK.

E. It's on the first floor.