根据短文内容及首字母提示，填写所缺单词，使短文意思完整。
June 5 is World Environment Day. This makes us pay more attention to our environment and the need to p (96) it.
When Wang Boxuan, a Beijing high Schoolboy, uses up his exercise books, he does not throw them away. Each one is stored at school with hundreds of exercise books given by other students. Then they are sold to a Beijing paper making factory.
The paper is r (97) and u (98) again by students and teachers in the school. At the same time, the money made from the sales goes towards schools in Inner Mongolia for p (99)trees and grass. This place is one of the sources of the sandstorms that often attack Beijing d (100) spring time.
Wang’s school is one of the schools in the capital that take part in the “green promise” environmental protection activity. So far, nearly 210,000 students have taken part in the activity, collecting more than 87 tons of waste paper.
With the ing of China’s 60th birthday, students are eager to help make the capital a more pleasant place.
“There are some environment p (101) in the city, s (102) as sandstorms.” said Wang. “We should do our duty and encourage o (103) to do so as well.”
Our Vice-Premier(副总理) has w (104) a letter to the teachers and students to encourage them to go on s (105) environmental protection.
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解析：
【小题1】protect 根据上文意思，世界环境日应该是保护环境的必要性，所以填protect
【小题2】recycled 通过上文对这名学生使用纸张的描述可知，纸张被回收到工厂，故填recycled，表被动语态
【小题3】used 通过上文的意思，纸张被回收，然后应该再被学生和老师使用，所以用used，被动语态
【小题4】planting 下文为树和草，应该是植树，所以填plant，for之后用Ving形式
【小题5】during 下文为春天，所以填during，表…时
【小题6】problems 根据下文的sandstorms,可以知道是环境问题，所以填problem，再加上前面有some修饰，谓语动词为are，所以用复数形式
【小题7】such 固定搭配，such as
【小题8】others 根据意思，我们应该鼓励别人也这样做，所以填others
【小题9】written 根据下文的信，所以指写信，故填write，has之后用动词的过去分词
【小题10】supporting 学生和老师的行为就是支持环境保护，所以用support，on之后用Ving形式