9. If you don't get out of mu house, I will call the police.
10. If we recycle, we will save nature resources.
11. If you don't start at once, you will be late for school
12.If you don't do it carefully, you will feel sorry afterwards.
13. If you work hard enough, you will pass this entrance examination
14. If you try your best, you will hope to be successful
15. If you don't try harder, you won't get good grades someday.