阅读理解June 5th is World Environment Day. This makes us pay more attention to our environment. When Wang Boxuan, a Beijing high schoolboy, uses up his exercise-books, he does not throw them away. Each one is kept at his school, together with hundreds of exercise-books that are given by other students. Then they are sold to a paper making factory in Beijing. The paper is recycled and used again by students and teachers in the school. At the same time, the money that is made from the sales goes to poor areas. People there use the money to plant more trees and grass. Sandstorms from this place often do harm to Beijing in spring. Wang's school is one of the schools in the capital that take part in the "Green Promise" environmental protection activity. So far, nearly 80% of the students have joined in the activity and collected more than 87 tons of waste paper.(1) 判断题Wang Boxuan and his schoolmates keep and sell used exercise-books.A 对B 错(2) 判断题The money made from the sales is used to help poor students.A 对B 错(3) 判断题Sandstorms are harmful to Beijing.A 对B 错(4) 判断题All the students have joined in the activity, collecting over 87 tons of waste paper.A 对B 错(5) 判断题World Environment Day is on July 5th.A 对B 错

我们来逐题分析这篇阅读理解的内容，并给出详细的解题过程和答案。

原文大意回顾：

6月5日是世界环境日，提醒人们关注环境问题。北京一名高中生王博轩在用完练习本后，不会扔掉，而是把它们留在学校。许多学生都这样做，这些用过的练习本被集中起来，卖给北京的一家造纸厂。纸张被回收再利用，供学校师生再次使用。卖废纸所得的钱被送到贫困地区，用于植树种草，以减少影响北京的沙尘暴。王博轩的学校参与了“绿色承诺”环保活动。目前，近80%的学生参与了这项活动，共收集了87吨以上的废纸。

（1）判断题：

Wang Boxuan and his schoolmates keep and sell used exercise-books.
王博轩和他的同学们保存并出售用过的练习本。

解题过程：
文中提到：“When Wang Boxuan... uses up his exercise-books, he does not throw them away. Each one is kept at his school, together with hundreds of exercise-books that are given by other students. Then they are sold to a paper making factory in Beijing.”
意思是王博轩不用的练习本被保存在学校，和其他同学交来的练习本一起，卖给造纸厂。

所以，他们确实保存并出售了用过的练习本。

答案：A 对

（2）判断题：

The money made from the sales is used to help poor students.
卖废纸所得的钱用来帮助贫困学生。

解题过程：
文中明确说：“the money that is made from the sales goes to poor areas. People there use the money to plant more trees and grass.”
意思是钱被送到贫困地区，用于植树种草，目的是防治沙尘暴，不是用来帮助贫困学生。

所以这个说法是错误的。

答案：B 错

（3）判断题：

Sandstorms are harmful to Beijing.
沙尘暴对北京有害。

解题过程：
文中提到：“Sandstorms from this place often do harm to Beijing in spring.”
“do harm to” 就是“对……有害”的意思。

所以，沙尘暴确实对北京有害。

答案：A 对

（4）判断题：

All the students have joined in the activity, collecting over 87 tons of waste paper.
所有学生都参加了活动，收集了87吨以上的废纸。

解题过程：
文中说：“So far, nearly 80% of the students have joined in the activity and collected more than 87 tons of waste paper.”
意思是“近80%的学生参加了活动”，而不是“所有学生”。

所以“all the students”（所有学生）的说法是错误的。

虽然“收集了87吨以上废纸”是对的，但主语是“近80%的学生”，不是“所有学生”。

因此整个句子是错的。

答案：B 错

（5）判断题：

World Environment Day is on July 5th.
世界环境日是7月5日。

解题过程：
文章第一句就明确指出：“June 5th is World Environment Day.”
即“6月5日是世界环境日”，不是7月5日。

所以这个说法是错误的。

答案：B 错

最终答案：

(1) A
(2) B
(3) A
(4) B
(5) B

\boxed{(1)A\ (2)B\ (3)A\ (4)B\ (5)B}