(2)     In the _______ _ 20 to 30 years, we have changed a lot.

A. past                       B. pass

C. passed                      D. passing

(1) Their profits (利润）have_______   30 percent！

A. fall to                       B. fallen to

C. fall by                      D. fallen by

Eating too much can be____________   (harm) to your health.

7.  endangered animals____________________

8.  采取行动 __________________

5.  fall by ____________________________

6.  环境保护____________________

3.  海洋生态系统 _________________

4.  食物链的顶端____________________

1.  shark fin soup____________________

2.  cut off ____________________________

.完形填空

There are many kinds of pollution around us，1  air pollution,  soil pollution,  noise pollution and light pollution. They are bad 2 our health in many ways.

Burning gas, oil and coal creates air pollution. It can cause sore eyes and breathing    3 .

With the increase of pollution and the development of industry, litter is everywhere. It makes our environment dirty. People put lots of rubbish in the land. Farmers use too many 4in the fields. They destroy the soil. So soil pollution has become serious.

Noise pollution can make people 5 .For example, people may lose their hearing if they work

 in a 6 place for a long time. Too much noise can cause high blood pressure 7  .

Working for a long time in strong, changeable light 8cause some kinds of illnesses. It makes people feel  9   and is especially bad for the eyes.

With 10pollution your planet will become greener and our health will be better. Let's be greener people.

(    )1. A. such as                B. for example

C. as well as               D. because of

(    )2. A. to                        B. in

C.for                     D. of

(     )3. A. questions              B. ideas

C. tests                    D. problems

(     )4. A. chemical               B. chemicals

C. chemist                   D. chemistry

(     )5. A. blind                     B. lame

C deaf                       D. healthy

(    )6. A. soft                 B. noisy

C. quiet                 D. peace

(     )7. A. as well              B. still

C. also                    D. either

(     )8. A. must                B. need

C. should                  D. may

(     )9. A. comfortable           B. possibly

C. terrible                D. terribly

(     )10. A. little              B. less

C. few                  D. fewer

(       )5. I _________a history teacher and now I'm an engineer.

A. used to                    B. used to be

C. used to being                D. was used to be

(       )4. Bike riding is good for______ and costs______ .

     A. health; nothing       B. health; anything 

       C. healthy; anything    D. healthily; nothing