9. The of waste paper can save a great amount of wood pulp. A. recycle B. recyclable C. recyclement D. recycling 10. Mrs Nga forgot to the faucet when she left for work. A. turn off B. turn on C. turn up D. turn down 11. This book is different ________ the one I had. A. with B. to C. from D. at 12. What will happen if the pollution ________ on. A. puts B. goes C. keeps D. takes 13. I’m afraid this article is ________ date. A. over B. pass C. behind D. out of 14. I had to get up early, I would miss the train. A. otherwise B. if not C. but D. so that 15. Most young people want to more about environmental problems. A. look up B. find out C. deal with D. make out