4.i think special, than than the largest animal(s) the best friend(s) the world.5. can work in a circus work on the farm my pet can jump play with вставить нужные слова,что бы получились предложения.

I think dogs are very special, because they are smarter than cats and than most of the largest animals. They are the best friends in the world. They can easily work in a circus. They can work on the farm. My pet dog can jump and play with me.