1 I'm not at school.
f. I'm at home
2 We aren't eight
g. We are nine
3 She isn't a teacher.
e. She's a doctor
4. It isn't Monday.
a. it's Tuesday
5 They aren't tomatoes.
d. They're apples
6 You aren't a firefighter.
b. You're a clown.
7 He isn't in the house.
c. He's in the garden