Какое верно?
1. Ann is tired: she ... all day and hasn't finished yet.

a. worked
b. had worked
c. has been working

2.This time next summer Peter …for his university exams

а. will read
b. will be reading
c. will have been reading

3. Look! It … again. – It seldom … here in May.

a. snows; snows
b. is snowing; snows
c. snows; is snowing