If he (study) ... harder, he can pass an exam

1. You could make much progress if you (attend) ..... class regularly.
2. If he (study) ...... harder, he can pass an exam.
3. She may be late if she (not hurry) ......
4. Tell him to ring me if you (see) ...... him.
5. What (you do) ..... if you got fat?
6. If you are kind to me, I (be) ...... good to you.
7. He (come) ..... if you waited.
8. If it (not,rain) ...... a lot, the rice crop wouldn't grow.
9. If I became very rich, I (build) ...... a hospital for the poor.