II

1 If we had enough money, we would have a holiday

2 If i knew the answer, i could tell you

3 If there were some eggs, i would make an omelette

4 If we didn't have three children, we would take a year off and travel around the world

5 If I were clever, I would be a doctor

6 If he were a wealthy man, he would spend all his money gambling

7 If i had spare time, i would learn Russian

8 If Jim didn't work very hard, he could  have time to spend with his family

9 If i didn't have a headache, I could go swimming

10 If we had a big house, we could invite friends to stay

III

1-b We'll never get to the meeting if the train doesn't leave within 5 minutes

2-d Alternative sources of funding must be found or the research will not be able to continue

3-c If the roads haven't changed in that part of the town, I'm sure i'll be able to find my  way there

4-a The weather must start improving soon or the farmers will lose their crops

5-e If isn't ridiculously expensive, I'll buy that painting

6-f You are only entitled to state benefit if you have been unemployed for 6 months