Question

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.__51___

___52___. 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 glaciersmelt, 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.

___53___. 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.___54____.____55____, 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 .

 

Answer 1

【答案】

 C

 D

 A

 E

 B

【解析】

 C 根據(jù)本段前面內(nèi)容可知這個國家面臨著巨大的威脅，如果沒有救助，滅亡之日不遠了。

 D 根據(jù)下文提及的威尼斯在過去的100年當中也下沉了很多，說明Tuvalu不是唯一面臨危險的國家。

 A 本段接下來的內(nèi)容都是講述的全球變暖的問題，故A正確。

 Ｅ 根據(jù)上文提及如果全球變暖不停止，將會有更大的氣候變化，后面接著就應該講述其中的一個變化，而海平面上升正是其中之一。

 B 接著上一句，如果海平面上升了一米，海水將會吞沒很多地方。那么這是一個虛擬語氣，且是與將來相反的虛擬語氣，省略了if，句子用倒裝的形式。