20. We lost the match. If you (play) _________ for us, we (win) __________
21. He (not, have) ___________ an accident if he had not been driving so fast.
22. Had I known that she was sick, I(visit) ____________ her
23. If today (be) ____________ Sunday, we wouldn’t have to work.
24. If I became very rich, I (build) _________ a hospital for the poor.