Starving polar bears are eating one another in the Arctic. Flowers are blooming too soon and die. The ice caps are melting so fast that rising water levels will threaten coastal towns along Florida within several decades. These are just a few examples of the terrible consequences of climate change supported by a new analysis in Nature.

In the past three decades, average global temperatures have risen about 0. 6°C and are projected to jump by about 1. 7°C by the end of the century, says Cynthia Rosenzweig, who leads the Climate Impacts Group at NASA’s Goddard Institute for Space Studies at Columbia University in New York. “We’ve already seen that a relatively low amount of warming,” she says, “can lead to a broad range of changes. ”

The unnatural warming caused by man-made greenhouse gases, especially carbon dioxide produced by cars and coal-powered plants, brings trouble for entire ecosystems. In North America alone, scientists have identified 89 species of plants, such as the American holly that have flowered earlier in the spring. In Spain, apple trees bloom 35 days ahead of schedule in response to the higher temperatures. Other wildlife, like the insects that use certain plants for food and the birds that feed on the insects, must then move forward their seasonal stirrings(萌動(dòng)) and mating(交配) patterns to survive.

To try to follow this time shift, some birds such as robins, the classic symbol of winter’s thaw(解凍時(shí)期), are returning to Colorado from their migrations some two weeks earlier than in years past. All these changes can throw a food chain in disorder. Some bird species that arrive before the insects reappear may starve to death.

“Around the world, plants and animals are waking up to an earlier alarm clock than they used to,” says Terry Root, a biologist from Stanford University.  

1.The underlined word “projected”(in Paragraph 2) probably means “____”.

A.forced

B.presented

C.indicated

D.predicted

2.According to the third paragraph, as a result of climate change ____ .

A.the warm weather wakes animals up earlier

B.certain trees bloom a season ahead of time

C.the birds need to change patterns of living

D.the American holly will flower in late spring

3.What can we know about robins according to the passage?

A.Farmers depend on them to tell the time.

B.They used to come back when spring came.

C.They used to predict the change of weather.

D.They usually migrate when seasons change.

4.What would be the best title for the passage?

A.Man is to blame for global warming

B.Great changes take place on Earth

C.Bird migration and climate change

D.Global warming changing nature’s clock

 

【答案】

1.D

2.C

3.B

4.D

【解析】略

 

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  Africa is now facing many problems. People are suffering(遭受) from a shortage(短缺) of food. They do not have enough health care. Deserts (沙漠) are spreading (擴(kuò)大) in many places.

   In Africa millions of people starved (餓) to death, and two thirds of them were children. Harry Belafonte, a famous singer in America, felt sad when he saw a film about the starving people in Africa. He said to himself, "I should do something to help them. What can I do?" He thought of a plan to gather the stars from the music world and make a special record. The money from the record would help the starving people in Africa. Those famous singers and musicians were always very busy. "How can you gather them?" everyone said to Belafonte. But they were willing to come to the event(活動(dòng)) from all over the country.

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   During the Christmas holidays in 1984, Michael Jackson and Lionel Richie were writing the words and music for the record at Jackson’ s home in Los Angeles. They often talked about the music far into the night. When they finished the music, they called it "We Are the World". On the evening of January 28th, 1985 ,forty -five superstars made a historical(歷史性的) recording in a Hollywood studio(演播室)." Everyone should do something active like this, "said Cyndi Lauper. "We have to be the voice," Stevie Wonere said," to help those people that have lost their future. "A sign was put at the door of the studio: "Please cheek your ego (自我) at the door!"

   At 10 P.M. they began their work. They finally finished recording at 8 A.M. that morning. Just at that moment Diana Ross sat down with tears in her eyes and said, "I just don’ t want this to end!"

   On April 5, more than 800 radio stations all over the world played "We Are The World" at the same time.

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     A. He thought he should tell other people about it.

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    C. With the baseball stars.           D. With the stars from the music.

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    A. The special record.              B. The money from record.

    C. The money from the stars.        D. The money from the government.

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     A. She didn’t want to continue such kindness.

     B. She wanted to continue doing such kindness.

     C. She didn’t want to stop recording.

D. She wanted to have a good rest.

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