题目内容：

We all need a healthy environment.      , we produce waste every day and it        harm to our environment. Though we are young, we can still do    to help. In fact, even the simplest everyday activities can make a real      to the environment. Here are some ideas for you to live a     life.

Remember these three     : reduce, reuse and recycle.

Reduce means “use less”. Don't         things. This saves money and reduces pollution and waste going into the environment. Before we buy something new, think if it is really        or maybe the     one will be just as good! When we do buy things, choose local products if possible, and try not to buy too many things from a        country.

Reuse means “use again”. Use things for     possible. When we buy things, make sure that they     a long time. We should take care of them     they will last, and we should     them if we can instead of throwing them away and buying new ones. Don't use a paper cup or a paper bag. It’s better to use a china cup and a lunch box because you can use them      .

Recycle means “change things into something else”. Although it     energy to change something into something else, it’s better than      things or burning them. Find out      can be recycled in your neighborhood and take part in recycling programs. We should also buy     made from recycled materials, such as recycled paper, to help save      .

1.A. Therefore    B. However   C. Otherwise   D. Besides

2.A. gives    B. takes    C. causes    D. does

3.A. something   B. everything   C. nothing   D. anything

4.A. difference   B. mistake   C. effect    D. help

5.A. busy     B. hard    C. green    D. happy

6.A. letters    B. words    C. sentences   D. lessons

7.A. buy      B. produce   C. save    D. waste

8.A. necessary    B. important   C. helpful    D. useful

9.A. cheap    B. expensive   C. new    D. old

10.A. rich    B. developed   C. foreign   D. poor

11.A. as soon as   B. as long as   C. as much as   D. as well as

12.A. use     B. last    C. keep    D. live

13.A. so that    B. if     C. because   D. though

14.A. sell     B. lend    C. throw    D. repair

15.A. less     B. more    C. again    D. better

16.A. costs    B. spends   C. takes    D. pays

17.A. throwing away  B. putting away  C. taking away    D. giving away

18.A. that     B. which    C. what    D. how

19.A. cups    B. bags    C. boxes    D. products

20.A. money    B. trees    C. paper    D. Time