Cut the hamburger ________ two pieces and eat! （  ）

A．in

B．by

C．of

D．with

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.

My clock stopped ________ ten o’clock last nigh.

A．at

B．in

C．to

选择适当的词填空。
side    of   hard sleepy hide
1. She is ______ because she got up too early this morning.
2. We can get to the other _____ of the river.
3. The cat came out _____ the river.
4. The students all work _____.
5. The mice _____ in a hole.

I go to the park________ bike. (　　)

A．by

B．on

C．in