Ann was  home last morning.

A．on

B．in

C．at

用适当的介词填空。(6分)
（1）We should be good________ animals.
（2）There are all kinds________ flowers on our planet.
（3）Mary's birthday is ________May.
（4）Pandas live  ________   the southwest  ________   China.
（5）Tom often goes to the library  ________   his friends.
（6）African elephants come________Africa.

I get up very late. I sleep ________ the day. （   ）

A．after

B．before

C．during

You must be very proud ____your country and your city.

A．of

B．at

C．in

Is there a book ______ the desk? (   )

A．on

B．of

C．with

D．/