选词填空 can can't

问题描述:

选词填空 can can't
Ducks____________fly.
Birds_____________swing.
Ducks____________swim.
I________________cat the trees.
Pandas__________climd trees.

Ducks can't fly.
Birds can swing.
Ducks can swim.
I can cat the trees.此处 cat作何解,我没查到,不知作何解,语感告诉我应是can,还望高人指点迷津.
Pandas can climbed trees.(climb中b虽不发音,但不要漏写咯) 熊猫会爬树,因为是熊猫科的.