ex1
1. had

2. would have visited

3. attended

4. knew

5. had arrived

6. studies

7. doesn't hurry

8. see

9. had spoken

10. would you do

Ex2.

1. If she had a college degree, she could be employed.

2. If I had enough money, I could go on a long holiday this year.

3. If he weren't very slow, we would give his such an important task.

4.  If I didn't have to work this Sunday, I would join your picnic.

5. If he didn't have to pay father's debt, he wouldn't work overtime to get more money.

6. If everything weren't expensive, city life would be enjoyable.

7. If she had learnt hard, she would have gotten bad mark.

8. If you are careful, you won't make accidents.

9. If I didn't forget the map, I wouldn't get lost

10. If their friend had come on time , they wouldn't have been angry