Ex 5
1)there isn't .2)there isn't .3)there aren't. 4)there aren't. 5)there isn't. 6)there isn't. 7)there aren't. 8)there aren't.9)there aren't.10)there isn't.
Ex 6
1)are there eleven descks in your classroom? 2)is there one window in your room? 3)are there five rooms in your flat? 4)is there a cat and a dog in the classroom? 5)are there five teachers at school? 6) is there a blackboard and a map in the classroom? 7)are there many toys in your room? 8)is there a mirror in your room? 9)is there a cup and a plate on your desk? 10)are there four lamps and a two windows in your classroom?