Вопрос по английскому языку:

ПОЖАЛУЙСТА ПОМОГИТЕ
Выберете модульный глагол
1.Children, you ...... do your homework every day!
a) must, b) should c) may
2. My friend says that I ... sleep more.
a) must, b) should c) may
3. ..... l come in?
a) must, b) should c) may
4."You .... take this medicine if you want to be healthy", said the doctor.
a) must, b) should c) may
5. ....l ask a question?
a) must, b) should c) may