通读全文，根据对短文的理解，选择正确的答案填空。   

    I can't remember when I started collecting litter. But it was when I got tired of 1 litter nearby that I realized no one else was going to pick it up.

    I live near a forest in Ohio, America. I can walk there  2 three minutes. I used to love going there to play with my dog. But one day there was 3 much litter there that I became very unhappy. I decided to clean up the forest, and I wanted to 4 happy when I went again. I made my first trip to clean the forest that afternoon. I took a big black rubbish bag with me. Ten minutes 5  I started to pick up litter, my bag was full! There were cans, bottles, broken glass and newspapers in it.

    From then on, I 6  to the forest four times a year to pick up litter. I often stay there for three hours. It makes me feel 7 to do something for the environment. After each trip, I look through all the litter that I've collected. If 8  of it is recyclable（可回收利用的）, I'll keep it. I can't understand why people drop litter. But I will keep on picking it up  9they stop dropping it. I know I am only doing a small bit  10 the earth, but I still think it is important.

材料一：

注：2014年我国国内生产总值（GDP）首次突破10万亿美元大关，成为仅次于美国的第二大经济体：我国单位GDP能耗降幅从2011年的2.0％增加到201 4年3．9％，但我国单位GDP能耗是美国的3.3倍。

材料二：11月9日，***在出席20 1 4年亚太经合组织（APEC）工商领导人峰会时首次明确提出中国经济新常态的3个主要特点：一是从高速增长转为中高速增长：二是经济结构不断优化升级，第三产业消费需求逐步成为主体，城乡区域差距逐步缩小，居民牧入占比上升，发展成果惠及更广大民众；三是从要索驱动、投资驱动转向创新驱动。 “旧常态”侧重于经济发展的高速和总量，而新常态则强调发展的效益和质量。

材料三：近年来，某市在发展过程中始终坚持合理的增长速度：提出全面转型，依靠科技进步与创新发展绿色产业，坚决剔除高能耗、高污染企业：继续推进民生改善、居民收入增长与经济发展同步；统筹城乡发展，精准扶贫，减小城乡居民收入差距。