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.

China is one______ the first countries in the UN.

A．/

B．for

C．Of

Let’s write the name ________ the address. (  )

A．and

B．at

C．but

put _____ your T-shirts. （    ）

A．in

B．on

My parents often watch TV _______home in the evening.  (　　)

A．in

B．at

C．on