Finish the second sentence in each pair, using If or Unless.
1. If you don’t do better work than this, you won’t pass the exam.
2. You can’t visit the United States unless you get a visa.
3. Unless someone has a key, we can’t get into the house.
4. Unless he phones immediately, he won’t get any information.
5. If Joe doesn’t change his ways, he will end up in prison.
6. If he doesn’t work harder, he’ll lose his job.
7. If it rains, we won’t go swimming.
8. You will become ill unless you stop working so hard.
9. If you work hard, you’ll pass your exam.
10. Unless you hurry, you won’t catch the bus.
11. If he doesn’t start work right now, he’ll never finish it.
12. We won’t get there on time without taking a taxi.
13. Joan will stay on at school unless she finds a good job before September.
14. If you don’t rest, you really will be ill.
15. The child will die if nobody sends for a doctor.
16. You won’t find any accommodation if you don’t book it in advance.
17. You will catch a cold if you don’t keep your feet dry.
18. I’ll call the police if you don’t leave me alone.
20. If he fails the final examination, he won’t be able to graduate.
21. If you are not careful, you will cut yourself with that knife.
22. If you don’t like this one, I’ll bring you another.
23. I’ll not able to do any work if I don’t have a quiet room.
24. If she doesn’t hurry, she’ll be late.
If he doesn’t take more care, he’ll have an accident.
-> Unless . ……………………………………………………………………………………………………….. .
The crops will be ruined if it doesn’t rain soon.
-> Unless ......... . ………………………………………………………………………………………………..
27. Unless the weather is fine, we’ll stay at home.
-> If . . . . ………………………………………………………………………………………………………..
28. I can’t go with you unless I get my work finished.
-> If ............... . ………………………………………………………………………………………………………..
29. If you don’t leave on the 15th , you’ll get home late for your mother’s party.
-> Unless............ . ………………………………………………………………………………………………..
30. Tom never does anything unless his father tells him what to do.
-> If ............ . ………………………………………………………………………………………………………..
31. Don’t take this job if you don’t really want it.
-> Unless ............ . ………………………………………………………………………………………………..
32. If she does nothing to prepare for the test, she will get bad marks.
-> Unless ......... . ……………………………………………………………………………………………………..
33. You can’t visit the United States unless you get a visa.
-> If ............... . ………………………………………………………………………………………………………..
34. Unless you remember our address, you can find it in the phone book.
-> If ...................... . …………………………………………………………………………………………..
