学进去

How many backpacks have you owned since you went to school? Backpacks 1． (become) common and popular among students in the past 30 years. If your backpacks become old, will you just treat them as rubbish and throw them away? Five years ago, a research 2． (show) that 85% of the old backpacks ended up in rubbish. But as we know, most backpacks are produced from different 3． (material). If we throw them away, they will be harmful 4． our environment.

Although some of the old backpacks are no longer of their right color or size, there are still many things you can do with them. Here are some 5． (use) ways for you. For example, do you feel it difficult to find 6． (you) tools in the house? You can solve this problem by 7． (make) use of your old backpacks to store all kinds of tools. Also, it is 8． wonderful idea that you can put your old backpacks online for sale. Besides, offering your backpacks to other poor kids is another good choice, as those old backpacks may make their life 9． (convenient) than before.

All in all, old backpacks are still of great value as long as we put them into use 10． (wise). Remember: rubbish can be turned into treasures!