EX3. 1. You could make better progress if you... (attend) class regularly 2. If I .... (know) his telephone number, I'd give it to you 3. If he worked more slowly, he... (not make) so many mistakes 4. I shouldn't drink that wine if I... (be) you 5. If someone (give).... you a boat, what you (do)....? 6. If you are kind to me, I (be)... good to you 7. He (come).... if you waited 8. If you (ring) ... the bell, the servant would come 9. It is (not, rain)... a lot, the rice crop wouldn't grow 10. If today (be) .... Sunday, we wouldn't have to work EX4: 1. Keep silent or you'll wake the baby up -> If....................... 2. Stop talking or you won't understand the lesson -> If................ 3. I don't know her number, so I don't ring her up -> If..................... 4. I don't know the answer, so I can't tell you ->......................... 5. We get lost because we don't have a map -> If................... 6. Susan felt sick because she ate four cream cakes ->If............................ 7. If anyone didn't come, we would phone you at once -> Unless................. 8. If we had enough rain, we couldn't grow rice -> Unless......................