1 . It has to be a community-wide effort, and everyone can help by following the golden rule: _________, ________ and ________.(根据句意完成句子)

2 . We’ve made environmental policies for business to observe, like strict ________ ________.(根据句意完成句子)

3 . They give this area ________ ________ ________ on the earth: one in ten known species in the world can be found here. (根据句意完成句子)

4 . In the last 500 years, over 300 species of animals ________ ________ ________.(根据句意完成句子)

5 . The Amazon rainforest ________ ________ ________ the planet by fixing carbon and producing over 20 per cent of all the Earth’s oxygen.(根据句意完成句子)

6 . Finally, it should be pointed out that enjoying ________of a crowd is not the same as being with friends. (根据句意填空)

8 . Naturally, this kind of openness results from a close friendship. With true friends, we feel free to share our joy and sadness________. (根据句意填空)

9 . As we live in social groups, there are________of friendships that we can enjoy. Generally speaking, close friendships have three “fruits”. (根据句意填空)

10 . Everything will turn out________in the end, and the changes and challenges of your teenage years will prepare you for adulthood. (根据句意填空)