A few years ago, some tourists pay no attention to environmental protection. They threw waste things 1. paid about, like plastic bags, fruit skins and waste papers . Sometimes they broke trees, picked 2. paper 3. 去掉 killed birds; some even made fires in the woods to cook for picnics. What dangerous it was! Fortunate , 4. How 5. Fortunately great changes have 6. 去掉 7. putting But they are making great efforts to protect birds and plants as well .They bring our own meals∧ prevent 8. And 9. their 10. to any accidental fire. All these should be appreciated |