E) Underline the correct answer. 1 Students - - leave the classroom before the bell rings. a must b) can c) should 2 You a) can brush your teeth regularly everyday. b) shouldn't 3. You ---- Smoke cigarettes in closed areas. a) can b) should c) mustat 4. You ----- touch burning items. a) should b) mustn't c) can 5. I am afraid I ---- come to your party tomorrow. a) cannot b) should c) must 6. I am not in a hurry! I have a lot of time and I wait. a) should b) can c) must 7.- I have more cheese on my sandwich?​