Unit 5 Стор. 46 - 53: 8

8. Виберіть правильний варіант "if" або "unless":

1. He will not learn much unless he works harder. 2. If you send a telegram now, he'll get it this evening. 3. Unless he starts immediately, he'll arrive by midday. 4. She will come if you ring her up. 5. If the clock is right, we'll catch the train. 6. I won't write to unless he writes to me. 7. I'll go to the door if hear the bell. 8. I won't go to the door unless I hear the bell. 9. He won't speak French unless he goes to France. 10. I'll kill myself unless you don't help me. 11. It won't be possible to travel unless you haven't got a passport.