( ) （3） 当你想问别人这是什么的时候， 应说：
A. What are you doing ? B. What are you work ? C. What is this?
Our classroom will move ________ the big house tomorrow.
A．in B．for C．to
There are ________ flowers around my school.
A．much B．lot C．many
The desk is ________ front of the chair.
A．on B．in C．at
Look at the photo ________ my sister.
A．of B．and C．by
We ________ about tongue twisters last Monday.
A．learn B．learned C．leaning