Exercițiile 3 și 4 va rog mult....Dacă se poate și repedeeee.... Dau coroană

3.1)Can you ride a scooter? C.Yes, i can.
2)Marcus,... you close the door, please? C.could
3)Which one is correct? A. He must go now.
4) Studets mustn't... D. go to the lab without their teacher.
5)I don't think... C. you should eat too much meat.
4.1) should
2)may
3)mustn't
4)may
5)can
6)Could