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 neighbourhood and take part in recycling programmes. 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. everything

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