6.people are not aware of keeping environment clean , they throw garbage in the streets --->If............................................................. 7.there was a loud noise next to my door last night ,so i couldn't sleep ----->because...................................................... 8.the storm destroyed many houses in this village last week ---->many houses................................................ 9. we use water carefully ,we have fresh water -->If........................................... 10.David had gone home before we arrived -->after...................... 11. although he was ill. he went to school yesterday -->despite....................... 12.i am not you , but i think you should recycle these plastic carrier bags -->If .............................. 13.this morning , i ate bread then i went to school -->before i went....................... 14.people destroyed forest , so there is a lot of flood now -->If.................................