Humans are trying what they can to prevent the earth (from) _____________ (pollute) further. 12 . Great changes ________________(take) place in China since the reform and opening-up policy started. 13. When we were walking past the stalls , a loud noise _______________(catch) my attention. 14. If you don ’ t tell the truth, you are likely _________________(reject) by the army. 15. With so many problems ________ _____ ____( deal ) with, the general manager has got to cancel his vacation plan.