Помогите пожалуйста решить задание по английскому языку.

insert the right form of the verb "to be"
l. These cases....very heavy
2. Look! There... Carol
3. I....hot. Can you open the window, please?
4. This castle... one thousand years old
5. My brother and I....good tennis players
6. i ...a student. My sister....an architect
7. The shops... not open today.
8. The examination ...not difficult
9. My hands....cold.
10. I ...not interested in football

Choose the right variant
11. How much... this sweater cost?
a) is
b) does
c) do
12. How much... this sweater?
a) is
b) does
c) do
13. It... rainy in summer
a) don't
b) doesn't
c) isn't
14. It....often rain in summer
a) don't
b) doesn't
c) isn't
15. I... stay at home on Sundays
a) am not
b) doesn't
c) don't