1. If you ............(press) that button, the light.........(go on).
2. I ............(visit) you today if you ...............(tell) me yesterday.
3. If you ........(not/eat) it, you ............(be) hungry.
4. If I .........(be) you, I ............(not/be) so sure of that.
5. If the day ..........(come), the sun ............(rise).
6. If I................(not/destroy) your computer last week, I ................(use) it yesterday
7. Jack ..............(kill) that man if he.............(be) more careful.
8. If we .................(live) in this country in 1994 we................(have) a beautiful house now.
9. If Bob .............(listen) to my advice he .........................(have to) come back home.
10. The cat...........(die) if you .................(not/feed) it.
11. We..............(go) home by bus if we ............(buy) tickets.
12. Unless the child..............(be) ill, he ...........(not/cry) all night.
13. If I .............(visit) my doctor last week, I ...........(have) all the needed medicines now.
14. You teeth .............(not/hurt) you if you...........(wash) them as a child.
15. If she............(take) the aspirin, the headache............(go by).
16. Unless we ..........(burn) the chicken, we...........(have) a delicious dinner.
17. If the mayor .............. (not/invite) that singer, the concert...........(not/take) place last summer.
18. If my daughter ...........(wear) a sweater in the morning, she............(not/be) cold now.
19. I ............(use) that ointment if I...........(be) sure it works.
20. If you .............(put on) that dress, you...........(look) nice.