Change to "This" or "That"

Change from plural to singular
1. Those are footballs >> is a football
2. These are cats >> is a cat
3. These are kites > is a kite
4. Those are cars >> is a car
5. Those are robots >> is a robot
6. These are dolls >> is a doll
7. Those are bats >> is a bat
8. These are jump ropes >> is a jump rope
9. These are bicycles >> is a bicycle
10. Those are lions >> is a lion