根据短文内容，用方框中所给单词的正确形式填空，使短文完整正确。（每个词只能用一次，有两个多余词）

long, cloth, ton, third, off, develop, short, cause, up, rapid, into, whether

How to be green

We all need a healthy environment, but we produce waste every day, and it is harmful to our environment. Repeat these ____47____ words daily: reduce, reuse and recycle.

Reduce means “use less”. Do not waste things. It saves money and ____48____ less pollution. Do not order more food than you can finish. Turn ____49____ the lights when you do not need them. Before you buy something new think ____50____ it is really necessary because maybe the old one is just as good!

Reuse means “use again”. Use things for as ____51____ as possible. Look after them so that they will last. Repair them if possible. Do not throw them away and buy new ones. Do not use paper cups or paper bags. It is better to use china cups and ____52____ bags because they can be used many times.

Recycle means “change things into something else to be reused”. Although it takes energy to change things ____53____ something else, it is better than throwing things away or burning them. We throw ____54____ of rubbish away each year, and we have to make a change. Divide your rubbish into plastic, glass, paper and rubber. ____55____ a recycling policy for the whole community. Buy products such as recycled paper to help save trees.

We cannot hope for _____56_____ change, but let’s take these simple steps today so that we will save the world for our grandsons and granddaughters tomorrow.