Sharks Perform a Service for Earth's Waters

It is hard to get people to think of sharks as anything but a deadly enemy. They are thought to attack frequently. Although these fish perform a 41___ ( value) service for earth's waters and for human beings. business and sport fishing are 42___ (threat) their existence.As a result,some sharks are at risk of disappearing from Earth.

Warm weather may influence. both fish and shark 43___ (active). Many fish swim near coastal areas because of their warm waters. Experts say sharks may follow the fish into the same areas，where people also swim. In fact ,most sharks do not44___( purpose)charge at or bite humans. They are__ 45 ( think) to mistake a person for a sea animal,such as a sea (海豹) or sea lion, That is why people should not swim in the ocean when the sun.46___ (go) down or comes up. because those are the times when sharks are looking for food. Experts also say that bright colors and shiny jewelry(珠 寶) may cause sharks to attack.

Medical researchers want to learn 47___ (much) about the shark's body defense and immune(免疫的) systems against disease. 48__ ( research) know that sharks recover quickly from injuries. They study the shark in hope of finding a way to fight human disease.

Sharks are important for the world's oceans,as they eat 49___(injure). and diseased fish. Their 50__ ( hunt) activities mean that the numbers of other fish in ocean waters do not become too great.This protects the plants and other forms of life that exist in the oceans.

American schools place great emphasis on the learner's()

• A、enrichment of knowledge

• B、accumulation of facts

• C、acquisition of the ability to be creative

• D、acquisition of the ability to work with his hands

McGrady's art is a spectacle

1.When Tracy MeGrady is healthy,his play can be 80 beautiful that even his own teammates on the court cannot help but admire it in the middle of a game.

2.“It's hard for me, because I'm a fan of basketball,”Houston point guard Rafer Alston told the Houston Chronicle newspaper after MeGrady' s 44-point performance against Utah on January 5.“When he's shooting the ball like that,a lot of times 1 m standing there watching and,all of a sudden, the other team' 8 getting the ball and going on a fast break, and I'm getting yelled at by the coach.”Indeed, McGrady" s body control. his energy , his shooting- watching these are like watching an artist at work, blending colours, constructing sentences, or playing music.

3.Unfortunately, MeGrady,27，hasn't always been. on the job, Already this season, he's missed seven games with back spasms. After Yao Ming was, injured on Dee. 23. it appeared Houston would be without both of its stars. MeGrady，however ,returned three days later and has been playing well ever since . scoring more than 30 points in

each of the last six games,as of Tuesday. Houston can't seem to get on without him. When MeGrady was injured, the Rockets won two and lost five.

4."Listen,there are. only four or five people on the entire planet that can do the things he can do with the basketball, ”forward Shane Battier said of McGrady. “From a fan's perspective - and we're fans even though we're players- it's rally fun to watch him do that. From a player's perspective,his game can affect the entire team. No question. We see him, .and we get excited,and that pumps us up. He keeps making shots ,and suddenly it seems to become easier for everybody. '

5.But it won't,really. Houston has just begun an important stretch on their schedule. Four of the next seven games will be played away from Houston- and without Yao. Six of the games will be against teams with winning records. Opponents will double- team McGrady in an attempt to dull the. impact of his art. Instead of watching.

McGrady's teammates will need to create a little art of their own,

16. Paragraph1

17. Paragraph2

18. Paragraph3

19. Paragraph4

20. Paragraph5

A. Necessity for the Teammates to Improve Their Own Skills

B. Evaluation from Two Different Perspectives

C. Spectacular Performance on the Court

D, Players. Houston Can't Do without

E. MeGrady ,an Excellent Basketball player

F. MeGrady 's Injury

21. McGrady plays basketball so well____

22. He has helped his team gain more points in some games____

23. Yao Ming missed several games____

24. There are very few people on the Earth____

25. Everyone will have to contribute____

A. that his teammates cannot help admiring him

B. that he is often yelled at by the coach

C. who can play basketball so well

D, because he had been injured

E. if Houston hopes to win

F. since he returned