1. If world is a stage, then life ... a game.
2. If you heat water to 100 C, it ...
3. I won't go to the party unless she ... me.
4. I ... grateful if you ... what I said to yourself.
5. Unless the weather ... better, I ...
6. If you want to be with me, ... me that you love me.
7. If this is a good article, I ... Formula One driver!
8. I ... you any alcohol, unless you ... over 18.
9. If it's true, we ... fired.
10. If we have to work together, we ... cooperate.
11. I ... very upset if those gossips ... to be true.
12. If I have to do this, I ...
13. Unless she ... her results, she ... to the concert.
14. If you take an aspirin, you ... better.
15. If you're in love with someone, everything ... different.