C．the Maldives D．the United States

解析：细节理解题。根据最后一段可判断出the Maldives与Tuvalu的情况相似。

答案：C

Ⅳ.完形填空

　　The ice sheets in the poles and glaciers on the high mountains are melting and the world is in danger of __1__.While you were surprised by the special __2__，you know that it is just a made-up story and there will be a hero to save the world.But what if the ice sheets are really __3__？ Can anyone save us?

　　__4__ to a scientific study last Monday，Arctic ice will completely __5__ in the summers by the end of this century unless carbon dioxide emissions are greatly __6__.

　　"The big melt has begun，" said Jennifer Morgan，from the Climate Change Campaign for the World Wildlife Fund (WWF). Arctic __7__ are rising at twice the global __8__ and could rise seven degrees centigrade by 2100.

　　The melting will cause sea levels to rise __9__ one metre，__10__ many coastal populations to move.

　　"The polar bear is one __11__ of an animal that could become extinct by the end of this century，" the WWF said.__12__，on the positive side, rising sea levels __13__ open up new areas for fishing and oil and gas exploration.

　　"Industrial countries are __14__ an uncontrolled experiment to study the effects of __15__ change. The Arctic is their first victim，" Morgan said.

Russia this month __16__ the Kyoto Protocol，an agreement to cut production of six greenhouse gases.But the US，the biggest polluter，__17__ to do so.In 2002,104 countries，__18__ China，accepted the agreement.