Now, many primary schools and middle schools are recycling textbooks. In my opinion, it’s necessary.现在,许多小学和中学都回收课本。

Now, many primary schools and middle schools are recycling textbooks. In my opinion, it’s necessary.现在,许多小学和中学都回收课本。

Every day, people have lots of waste to throw away. Such as used handkerchiefs,plastic bags, boxes, bottles an

Every day, people have lots of waste to throw away. Such as used handkerchiefs,plastic bags, boxes, bottles an