9.Dogs are often known(61)as"man's best friends".
The most attractive quality of a dog is its faith in the owner and its loyalty.They always greet us when we come home and they will never leave us in a desperate situation.For example,there was a very sick man and his dog barked and barked until the rescue team(62)arrived(arrive).
Furthermore,dogs are strong animals(63)that/whichwill protect us.Houses with dogs are considered much safer.Not only will they stop the thieves,(64)butthey will also fight against fire.For example,there was a serious fire and a dog tried(65)to pull(pull) its owner out.
And(66)finally(final),dogs can be trained by people.Dogs can do a number of things that people can not.For example,they make contributions(67)tofinding out drugs,bodies,illegal DVDs and hunt down prisoners with(68)their(they) noses.They're also used to help the elderly and disabled.
To sum up,dogs are really friendly,(69)practical(practice)and loyal(70)animals(animal).