11. If the weather stays good next weekend, we………… (probably / go ) away somewhere. 12. Come on! If we (hurry)…………………….,we ( catch )……………….. the bus. 13. There (be)…………………big floods every year if the cutting down of trees continues. 14. If there (be) ……………….too much litter on the streets, the environment will become polluted. 15. If the sea level (rise)…………………, there will be floods in many parts of the world. 16. They will be late for their meeting if they ( not leave )…………………………now. 17. If you aren’t careful, you (drop)…………………………..the plates. 18. If anyone (phone)…………………………. me , tell them I’m out. 19. If he ( not use)……………………much pesticide on vegetables, they will become edible. 20. What (you/ do) ............................... if you are free tomorrow, Lan?