1. You can't talk in this room. - Quiet, please! (1-C)
2. You can't pay with a credit or debit card. - Cash only. (2-E)
3. You must be a student to enter the library. - Students only. Please show your ID. (3 - B)
4. I have to finish my homework today. - Students must hand in their essays tomorrow. (4 - A)
5. I should go to a tutor for help with my English. - Tutors available Tuesday and Thursday afternoons. (5 - D)