编一个英语对话，是同学一起去动物园的。10来句就行，最好4个人的！

A：Hey, there is a brown bear!
B: Where is it?
A: There, behind the monkey cage.
B: Wow, I see, it's such a big one.
C: I like bear, let's go and have a look.
D: OK, let's go.
C: I heard that brown bear is a kind of the greatest bear in the world.
A: Look at its paw and the fingernails.
C: Yes they use it to attack their prey, and their fingernail is so sharp.
B: Guess if it stroke your face with that fat paw?
A: I'd better not.
D: I think we'd better keep far away from the cage.
C: Yes it's not a good idea to check its terrible prey ability.
A: How do you know so much of animals?
C: I always read books about them, I like animals.
D: So do I. Could you lend me some books?
C: Sure if you like.