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　　You might think that “global warming” means nothing more than a rise in the world's temperature．But rising sea levels caused by it have resulted in the first evacuation(撤離)of an island nation－the citizens of Tuvalu will have to leave their homeland．

　　During the 20th century, sea level rose 8－12 inches．As a result．Tuvalu has experienced lowland flooding of salt water which has polluted the country's drinking water．

　　Paani Laupepa, a Tuvaluan government official, reported to the Earth Policy Institute that the nation suffered an unusually high number of fierce storms in the past ten years．Many scientists connect higher surface water temperatures resulting from global warming to greater and more damaging storms．

　　Laupepa expressed dissatisfaction with the United States for refusing to sign the Kyoto Protocol, an international agreement calling for industrialized nations to reduce their greenhouse gas emissions(導致溫室效應的氣體排放),which are a main cause of global warming．“By refusing to sign the agreement, the US has effectively taken away the freedom of future generations of Tuvaluans to live where their forefathers have lived for thousands of years,” Laupepa told the BBC．

　　Tuvalu has asked Australia and New Zealand to allow the gradual move of its people to both countries．

　　Tuvalu is not the only country that is vulnerable(易受影響的)to rising sea levels．Maumoon Gayoon, president of the Maldives, told the United Nations that global warming has made his country of 311,000 an “endangered nation”．

1．What is the direct cause of more and fiercer storms according to scientists?(no more than 8 words)

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2．Why was Laupepa not satisfied with the United States?(no more than 10 words)

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3．Which country' s situation is similar to that of Tuvalu?(no more than 2 words)

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4．What is the text mainly about?(no more than 7 words)

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根據短文內容，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。

　　TUVALU, a tiny country in the Pacific Ocean, has asked for help as it fears it will be swallowed up by the sea．Storms and huge waves are a constant threat and none of Tuvalu's nine little islands is more than five meters above sea level, Salt water is already entering the country's drinking water supply, as well as damaging plants that produce fruit and vegetable．　　1　　

　　　　2　　．Venice, a historic city in Italy best known for its canals, has sunk about 24 cm over the past 100 years．Experts say that it will have sunk another 20-50cm by 2050．A century ago, St．Mark's Square, the lowest point in the city, floodedd about nine times a year, Nowadays, it happens more than 100 times．While Venice is slowly sinking into the mud on which it stands, Tuvalu's rising sea level is caused by global warming．

　　The average global temperature has increased by almost 0.5 centigrade degrees over the past century; scientists expect it to rise by extra 1-3 degrees over the next 100 years．

　　Warmer weather makes glaciers melt, adding more water to the ocean．The warmer temperatures also make water expand, so it takes up more space, causing the sea level to rise．The sea level has risen about 10-25 cm in the last 100 years．

　　　　3　　．Through burning coal, oil and gas, people have been increasing the greenhouse gases in the atmosphere, such as CO₂．This adds to the power of the greenhouse effect, making the planet even warmer．

　　Many scientists believe that, if the warming is not stopped, there will be huge climate changes．　　4　　．

　　　　5　　, the sea will swallow up millions of homes and the world will be flooded with “climate refugees” looking for somewhere to live．

A．The main cause of global warming is human pollution

B．Should this come true

C．Without urgent help, the country's days are numbered．

D．But Tuvalu is not the first place to face sinking into the sea

E．The sea level could rise by one meter this century．

F．people face a lot of pollution．

G．much has been done about our planet．