E　　
As a result of pollution , Lake Erie , on the borders of the USA and Canada, is now without any living things.　　
Pollution in water is not simply a matter of “poisons” killing large numbers of fish overnight. Very often the effects of pollution are not noticed for many months or years because the first organism(生物体 ) to be affected are either plants or plankton. But these organisms are the food of fish and birds and other creatures. When this food disappears, the fish and birds die too. In this way a whole food chain can be wiped out, and it is not until dead fish and water birds are seen at the river’s edge or on the sea shore that people realize what is happening.　　
Where do the substances which pollute the water come form? There are two main sources sewage (污水) and industrial waste. As more detergent (洗涤剂 ) is used in the home, so more of it is finally put into our rivers. lakes and seas. Detergents harm water birds dissolving the natural substances which keep their feathers waterproof. Sewage itself, if not properly treated, makes the water dirty and prevents all forms of life in rivers and the sea from receiving the oxygen they need. Industrial waste is even more harmful since there are many highly poisonous things in it, such as copper and lead(铅 ).　　
So , if we want or stop this pollution , the answer is simple: sewage and industrial waste must be made clean before flowing into the water. It may already be too late to save some rivers and lakes, but others can still be saved if the correct action is taken at once.　　
72. Pollution in water is noticed _____. 　　
A. when the first organisms are affected    B. when a good many fish and birds die 　　
C. when poisonous things are poured into water      　　
D. as soon as the balance of nature is destroyed 　　
73. The living things die because there is no ____ in the lake or river.  　　
A. water          B. fish               C. poison           D. oxygen 　　
74. Which of the following is harmful according to the passage? 　　
A. Organisms                             B. Plants and plankton in the water     　　
C. Waste water from cleaning   D. Industrial waste made clear before flowing into the water 　　
75.The way to stop water pollution is _______.　　
A. realize the serious situation clearly 　　
B. put oxygen into the river 　　
C. make the waste material harmless before flowing into the water 　　
D. make special room in the sea for our rubbish　　

Bicycle Safety

Operation　Always ride your bike in a safe, controlled manner on campus. Obey rules and regulations. Watch out for walkers and other bicyclists, and always use your lights in dark conditions.

Theft Prevention　Always securely lock your bicycle to a bicycle rack—even if you are only away for a minute. Register your bike with the University Department of Public Safety. It’s fast, easy, and free. Registration permanently records your serial number, which is useful in the possible recovery of the bike stolen.

Equipment

Brakes　Make sure that they are in good working order and adjusted properly.

Helmet　A necessity, make sure your helmet meets current safety standards and fits properly.

Lights　Always have a front headlight—visible at least 500 feet in front of the bike. A taillight is a good idea.

Rules of the Road

Riding on Campus　As a bicycle rider, you have a responsibility to ride only on streets and posted bicycle paths. Riding on sidewalks or other walkways can lead to a fine. The speed limit for bicycles on campus is 15 mph, unless otherwise posted. Always give the right of way to walkers. If you are involved in an accident, you are required to offer appropriate aid, call the Department of Public Safety and remain at the scene until the officer lets you go.

Bicycle Parking　

Only park in areas reserved for bikes. Trees, handrails, hallways, and sign posts are not for bicycle parking, and parking in such spots can result in a fine.

If Things Go Wrong

If you break the rules, you will be fined. Besides violating rules while riding bicycles on campus, you could be fined for:

×No bicycle registration…$25      ×Bicycle parking banned…$30

×Blocking path with bicycle…$40   ×Violation of bicycle equipment requirement…$35

1.Registration of your bicycle may help you 　　　.

A. find your stolen bicycle                   B. get your serial number

C. receive free repair services                 D. settle conflicts with walkers

2.According to the passage, what bike equipment is a free choice for bicycle riders?

A. Brakes.          B. A helmet.      C. A headlight.               D. A taillight.

3.If you lock your bicycle to a tree on the campus, you could be fined 　　　.

A.$25                           B.$30                           C.$35                               D.$40

4. What is the passage mainly about?

A. A guide for safe bicycling on campus

B. Directions for bicycle tour on campus

C. Regulations of bicycle race on campus

D. Rules for riding motor vehicles on campus

At the age of 13，I visited a doctor with my parents. As I sat in the examining chair，the doctor looked into my 　31　.“She did inherit (继承) it，”he said with coldness.“You need to be prepared. There is no 　32　 for this disease.”

My father 　33　 a gene which，in most cases，results in blindness. I’d inherited the gene. He gradually 　34　 his eyesight and so did I. At last we were both 　35　 blind—he was fifty-seven years old，　36　 I was only twenty-eight.

My world 　37　 as the darkness fell，　38　 the dreams my husband and I had for us and for our three little boys. But 　39　 I tried to find some hope and 　40　，my eyes were opened to a new realization.

My father had 　41　 me not just failing eyesight，but an example of 　42　 in the face of hardships as well. We were all living in Bolivia in 1964 when he decided to 　43　 the family to America. He worked tirelessly to 　44 the right of living in the US.

Alone in the States，he 　45　 his helplessness and lack of fluency in English. He managed to rent a small apartment，and nine months later，sent airline tickets for my mom，my brother and me.

Decades later，　46 an American citizen，I look back at what he'd shown me. He set an example proving that determination is important to success. His 　47　 taught me valuable lessons for my own path in the darkness.

I did the same as I stepped into a 　48　 world. I fulfilled (完成) my own 　49　 as a wife，mom，Sunday school teacher and Spanish interpreter. What I inherited from my father helped me to 50　 my life in a whole new light.

1.A.mouth           B.eyes          C.ears          D.throat

2.A.solution         B.reason         C.excuse          D.cure

3..A.carried            B.spread            C.infected      D.raised

4.A.damaged         B.lost         C.recovered     D.gained

5.A.rapidly         B.nearly         C.completely       D.terribly

6.A.though              B.but               C.so                D.since

7.A.broke down      B.broke off     C.broke away        D.broke out

8.A.realizing           B.sharing      C.disturbing        D.destroying

9.A.when            B.before         C.unless           D.until

10.A.honour         B.beauty            C.strength      D.failure

11.A.handed         B.rewarded      C.given         D.taught

12.A.contribution       B.determination C.challenge     D.honesty

13.A.move           B.settle            C.arrange           D.send

14.A.enjoy           B.declare          C.apply         D.win

15.A.accepted       B.admitted      C.overcame      D.met

16.A.as                 B.like          C.for            D.to

17.A.knowledge      B.journey           C.situation          D.event

18.A.cruel          B.inner             C.modern         D. dark

19.A.promises       B. hopes            C. roles            D. changes

20.A.touch          B. end          C. save           D. see

完形填空

　　As a teenager, I felt I was always letting people down. I was rebellious （反叛的）on the outside,___1___on the inside I wanted people to ___2____me.

　　Once I left home to hitchhike（搭便车）to California with my friend Penelope. The trip wasn't ____3___, and there were many times I didn't feel safe. One situation in particular ___4____ me grateful to still be alive. When I returned home, I was not so outwardly（表面地）different.

　　I was happy to be home. But then I noticed that Penelope, who was____5____with us, was wearing my clothes. And my ____6____seemed to like her better than me. I wondered if I would be __7___if I weren't there. I told my mom, and she explained that ___8___Penelope was a lovely girl, no one could ___9___me. I pointed out,”She is more patient and is heater than I have ever been.” My mom said these were wonderful ___10____,but I was the only person who could fill my ___11____. She made me realize that even with my____12_____——and they were many ——I was a loved member of the family who couldn't be replaced.

　　I became a searcher,___13___who I was and what made me unique（独特的）. My____14___of myself was changing. I wanted a solid base to start from. I started to resist（抵制）pressure to ___15___in ways that I didn't like any more, and I ___16___who I really was. I came to feel much more ____17___that no one can ever take my place.

　　Each of us ____18____ a unique place in the world. You are special, no matter what others say or what you may think. So ____19___ about being replaced. You ___20___ be.