I. III. Complete the exercise with If or Unless.
1. We cannot go sailing _______ the rain stops.
2. I won't talk to her _______ she apologizes to me.
3. You won't be able to find the house ________ you get help from your GPS.
4. I won't go _______ he is going.
5. _________ we don’t take the necessary measures now, we may have serious
problems later.
6. _________ you don't take notes you will have hard time studying later.
7. She must have graduated already ________ she failed a class.
8. Jason is always cheerful _________ something really bad happens.
9. I will never forgive you _______ you tell him the truth.
10. You are not allowed into the casino _______ you are under 21 years old.
11. My mother will cook ________ they decide to eat out.
12. I should be there by 11 o'clock ________ I don't catch any traffic.
13. I should be there by 11 o'clock _______ I catch a lot of traffic.
14. The show should start at 9:30 ________ they changed the schedule.
15. ________ they behave well, those children are not welcomed here.
1. unless
2. unless
3. unless
4. if / unless
5. If
6. unless
7. unless
8. unless
9. if / unless
10. if
11. if
12. unless
13. unless
14. unless
15. unless
Đáp án:1.Unless
2.Unless
3.Unless
4.If
5.If
6.Unless
7.Unless
8.Unless
9.If
10.If
11.If
12.Unless
13.Unless
14.Unless
15.Unless.