给下列句子选择恰当的答句。

A．Thank you.

B．On the teacher's desk.

C．Wow! It's so big.

D．A teacher's desk and many desks.

E．OK.
【小题1】Where is the green book? （______）
【小题2】Let me help you. （______）
【小题3】Look, we have a new classroom. （______）
【小题4】Close the window. （______）
【小题5】What's in the classroom? （______）