完形填空。

A boy and a girl catch a bird and1it in a birdcage (鸟笼). They like it 2 and come to3it every day. A cat sees the bird and wants 4supper.5 the bird is in the cage. She can't catch it. So she is very6.

One day, she opens the door of the cage 7 wants to catch it. But the bird flies away. The cat 8, so she has 9. The two children 10 and see the bird isn't in the cage. They are very angry and put the cat into the cage.