Вопрос по английскому языку:

4. The shops are not open - Sundays.
A) in
B) on
C) at
5. What fruit do you eat -- winter?
A) in
B) on
C) at
6. His birthday party is __ Saturday.
A) in
B) on
7. I have a shower_ I get dressed.
A) before B) after C) now
8. Paul's birthday is - July 4th.
A) in B) on . C) at
9. My guitar lesson is __ Tuesday.
A) in
B) on
C) at
10. What are you doing here -- midnight?
A) n
B) on
C) at
11. I brush my teeth ___I have lunch.
A) before B) after C) now
12. Mother's Day is ___March.
A) in
B) on
C)at
13. My holidays begin __August 15th
A) in
B) on
C) at
помогите пожалуйста​