I. Choose appropriate modals to complete the following sentences. (5 points)
1. The tourists (may/ must) stay in Iran for two more days.
2. Everyone (should/ can) respect other people’s culture.
3. Please help me. I (cannot/ may not) swim.
4. (May/ Must) I sit down?
5. There are many clouds in the sky. It (may/ can) rain.
6. He (must not/ may not) do more exercises. His heart is very weak.
7. (May/ Must) I use your pencil?
8. You (can/ must) get a passport first.
9. You (may/ must) watch TV.
10. We (must/ may) finish our English book before Khordad.