Question

1).... the girls at home?
No, they.... . They .... at the supermarket.
2).... Mary is her room?
No she .... She ... at school.
3).........you in the country?
No, I ..... . I...... in the city.

Answer 1

1) Are
 aren't; are
2)Is; isn't ; is;
3) Are; am not; am