Исправь предложения. например;it`s a book.-it isn`t a book. it`s an exercise. (теперь наши слова.) 1) they`re chairs

It`s a book. - It isn\'t a book.- It`s an exercise. 1. They`re chairs. - They aren\'t chairs. - They are armchairs. 2. It`s a blackboard. - It isn\'t a blackboard. - It is a map. 3. They`re old. - They aren\'t old. - They are young. 4. It`s brown. - It isn\'t brown. - It is yellow.