Look, read and choose：Come ______（in / out）, please!

We invite our friends ____our house.

A．in

B．to

C．at

选词填空。
in   on   at   of   for
1. I live _____ Beijing.
2. I see a book ____ the desk.
3. I usually stay____ home.
4. How many months are there ___ a year？
5. December is the last month ___ the year.
6. This is ____ you.
7. We write Christmas cards ___our friends and family.

在周日(    )

A．at Sundays

B．on Sundays

在机场（   ）

A．in the plane

B．at the airport

C．to the airport