根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

Imagine that you are swimming in the middle of an ocean.You look down and see a wonderful underwater land of colours and fish of all shapes and sizes.This is the huge and colourful land of coral and the home of millions of different fishes.1.　　　 Therefore,most coral reefs started developing over 10,000 years ago.

Coral reefs are living structures built up over thousands of years by tiny animals called polyps(珊瑚虫),which usually live together in groups.Each polyp makes a stony skeleton (骨骼) around its body,and the skeletons of all the polyps in a group are joined together.When the polyps die,their bodies decay.Their hard skeletons remain behind.2.　　　 Gradually,over long periods of time,reefs of coral skeletons are built up in the ocean,with living coral on the surface.

3.　　　 It stretches for more than 1,300 miles along the Northern Eastern coast of Australia.The Great Barrier Reef has more than 2,600 kinds of coral altogether.It is the largest gr oup of coral in the world.All together,it covers an area about half the size of Texas.

The Great Barrier Reef does a lot of things for a lot of people,not just fish.It gives the fishermen plenty of fish,gives the tourists something to look at,and gives the scientists something to study.4.　　　 This happens by pollution and throwing anchors on the Great Barrier Reef.

Worldwide,there are more than 4,000 kinds of reef fish.The Great Barrier Reef supports about 1,500 different species of fish.There are also crabs,sea turtles,sea sponges,and colourful marine worms living in it.5.　　　 Those are only some of the species out of the thousand,and still we find more species every year.However,if we don't start protecting the reef,some species will be in danger or eventually die.

A.Coral only grows a few inches each year.

B.New polyps grow on the top of the ones that died.

C.You realize it is the home of millions of different fishes.

D.Here are some facts about coral that are really interesting.

E.The Great Barrier Reef is one of the earth's natural wonders.

F.However,many people kill parts of it,and it is in danger of extinction.

G.Besides,you would probably see a big blue starfish and snails with beautiful shells.

答案:1~5 ABEFG

五、完形填空

If you want to learn a new language,the very first thing to think about is why.Do you need it for a 　1　 reason,such as your job or your studies?　2　 perhaps you're interested in the 　3　,films or music of a different country and you know how much it will help to have a 　4　 of the language.

Most people learn best using a variety of 　5　,but traditional classes are an ideal(理想的) start for many people.They 　6　 an environment where you can practice under the 　7　 of someone who's good at the language.We all lead 　8　 lives and learning a language takes 　9　.You will have more success if you study regularly,so try to develop a 　10　.It doesn't matter if you haven't got long.Becoming fluent in a language will take years,but learning to get by takes