根據(jù)短文內(nèi)容，從短文后的選項中選出能填入空白處的最佳選項。選項中有兩項為多余選項。

Coral reefs

For millions of years, coral reefs have provided homes and food for thousands of different living things. Fish and sea birds share the reef with other sea creatures. Now these beautiful places are in danger. 1. Scientists have found that people and pollution have ruined more than one-fourth of the earth’s coral reefs. Unless things change, all of the remaining reefs may die within your lifetime.

Some people think that coral is stone because of its rough, hard surface. But coral is an animal! Tiny polyps (水螅體) form the coral reefs. 2. These colours come from the algae (海藻) living inside the coral. Billions of coral polyps stick together. New ones grow on the dead corals. This happens year after year. Over time, the coral builds up a reef. The reef rises from the ocean floor until it almost reaches the sea’s surface. It takes coral 500,000 years to build a huge reef. 3.

The coral reefs have been harmed in different ways. People have broken off pieces of coral. They wanted to sell or keep them. To catch more fish, people have dropped sticks of dynamite (炸藥) into the water. 4. Water pollution has encouraged overgrowth of the sea plants that grow near coral reefs. They block out the sunlight that the algae need. 5. Warm water kills the algae. When the algae die, the coral loses both its food and its color. The coral turns white and dies. Scientists call this coral bleaching (珊瑚白化). The bleached part of the coral reef cannot recover.

A. They come in many colours.

B. This has blown up parts of the reefs.

C. So are all the sea plants and animals that depend on them.

D. The worst problem is the heating up of the world’s oceans.

E. Coral reefs are experiencing a rapid increase in most locations.

F. However, it has taken human beings less than 100 years to destroy the reefs.

G. They cover less than 1% of the ocean floor, but support about 25% of sea creatures.

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閱讀下列短文，從每題所給的四個選項（A、B、C和D）中，選出最佳選項。

A

It is quite unusual to know who contributes most to the first Oxford English Dictionary. In 1879, Oxford University in England asked Prof. James Murray to serve as editor for what was to be the most ambitious dictionary in the history of the English language. It would include every English word possible and would give not only the definition but also the history of the word and quotations (引文)showing how it was used.

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Minor joined the army of volunteers sending words and quotations to Murray. Over the next years, he became one of the staff’s most valued contributors.

But he was also a mystery. In spite of many invitations, he would always decline to visit Oxford. So in 1897， Murray finally decided to travel to Crowthorne himself. When he arrived, he found Minor locked in a book-lined cell at the Broadmoor Asylum for the criminally insane.

Murray and Minor became friends, sharing their love of words. Minor continued contributing to the dictionary, sending in more than 10,000 submissions in 20 years. Murray continued to visit Minor regularly, sometimes taking walks with him around the asylum grounds.

In 1910, Minor left Broadmoor for an asylum in his native America. Murray was at the port to wave goodbye to his remarkable friend.

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For years we have been told that encouraging a child’s self-respect is important to his or her success in life. But child experts are now learning that too much praise can lead to the opposite effect. Praise-aholic kids who expect it at every turn may become teens who seek the same kind of approval from their friends when asked if they want to go in the backseat of the car.

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People in different cultures think it good for them to share a popular language. They can quickly share ideas and work together. Knowing the same language means easier communication and is a basis for trust.

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Time will have the last word.

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B. people would have no trouble in learning language

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