Замените слова в скобках на he.she.it.they he is jim.she is jill. (jim) has got a dog. (the dog ) is black. (jill) has got a cat. (the cat) is grey. (the dog and the cat) can jump.

He is Jim.She is Jill. He has got a dog. It is black. She has got a cat. It is grey. They can jump.