Sắp xếp các từ sau thành câu hoàn chỉnh: waste/ we/ and/ pigs/ to/ feed/ it/ food/ collect. the rivers/ the oeans/ and/ what/ is/ polluting/ land?

Sắp xếp các từ sau thành câu hoàn chỉnh:
1. waste/ we/ and/ pigs/ to/ feed/ it/ food/ collect.
2. the rivers/ the oeans/ and/ what/ is/ polluting/ land?
3. grass/ the/ keep/ off .
4. factories/ do/ paper/ waste/ do/ what/ with ?
5. our/ we/ in/ trash/ can/ a/ should/ leave/ trash .
6. see/ a/ you/ faucet/ off/ it/ turn/ dripping/ when .
7. the/ why/ more/ need/ food/ does/ world ?
8. burning/ we/ much/ coal/ gas/ oil/ and/ are/ too .