Use the correct form of the verbs in parentheses:
1. If the weather..........good next weekend, we..........away somewhere. (stay/ go)
2. Come on! If we................., we............the bus. (hurry/ catch)
3. There..........big floods every year if the cutting down of trees countinues. (be)
4. If there............. too much litter in the strees, the environment will become polluted. (be)
5. If the sea level .............., there will be many floods in many parts of the world. (rise)
6. They will be late for the meeting if they .............. now. (not leave)
7. If you aren't careful, you ............the plates. (drop)
8. If anyone ......... me, please tell them I'm out. (phone)
9. If crops............ with pesticides, they ........... by insects insoil. (spray/ destroy)
10. If he ............ too much pesticide on vegetables, they will become edible. (not use)