Nowadays,many many people have pets like dogs,cats and fish.They're all our best friends.But among all of them,dogs are one of the cleverest animals as our pets.They're lovely and helpful,too.Many many years ago,people kept a dog as a pet because it could guard the caves they lived in.Early men cuold use tols to hunt animals but they couldn't run very fast,so they also kept a dog to help them hunt animals for food.Nowadays,dogs also help the police and the officers at the airport to make the city safe.They also help the blind people and farmers to do amny things.As you can ssee,dogs are our best friends.We mustn't be cruel to them.We must take care of them.
