Unit 3　Our animal friends

David:Welcome to Dogs' World.What's your dog's name,Officer White?

Officer White:He's called Billy.

David:What kind of work does Billy do?

Officer White:He works at the airport.He smells people's bags and tries to find dangerous things.

David:Billy does a great job.Jane,you have your pet dog Suzy with you today.I heard that she helped you a lot last month.

Jane:Yes.I was very sick and I couldn't walk around.She turned on and off the lights,brought me things,and even answered the door!

David:What a clever dog!My dog only knows how to eat and sleep!Miss Brown,your dog Winnie is very famous.She appears on TV very often.

Miss Brown:Yes,but she can't act when she's hungry or tired.

David:Just like me!I can't work when I'm hungry or tired.