文本：
Lesson 21 Chicken
chicken!
't call me chicken.
3.I prefer chicken.
4.I'm no chicken.
's pretty but no chicken.
chickened out because of fear.
7.1000 yuan is chicken-feed to him.
't count your chickens before they're hatched.
Lesson 22 Hand
s off!
him your big hands.
got the upper hand.
4.I'm not much of a hand at it.
have to have your hand in.
't take a hand in it.
7.I could beat you with my hand tied behind my back.
8.I have my hands full.