I. 1. will give

2. would type

3. would have visited

4. attended

5. knew

6. had arrived

7. would not make

8. were

9. find

10. would be

11. would have had/ had not spent

12.

13. press/ save

14. will be happy/ teaches

15. buy/ will not lose

II.

2. If you don't stop talking, you will not understand the lesson

3. If I knew her number, I would ring her up.

4. If I knew the answer, I could tell you

5. If we had had a map, we would not have got lost.

6. If Susan hadn't eaten 4 cream cakes, she would not have felt sick

7. Had it not been for this treatment, the patient would have died

8. If he hadn't been late every day, he would not have lost his job

9. If Peter didn't eat so many chips, he would not be fat

10. If Robert had not started smoking cigarettes, he would not have got a bad cough

III. 1. B 2. A 3. A 4. B