Antarctica is the highest continent on Earth，with the coldest temperatures anti the most wind．People have never wanted to live there because it is so cold．The（A）_________ temperature once was －89.2℃! But now scientists from all over the world come to study the ice．They want to（B）learn more about the Earth's history．

Some scientists live on Antarctica for part of the year．But they don't usually stay there for more than six months．Why? There are six months of light and six months of darkness .

Antarctica usually has a good deal of fine weather（C）_________any wind at all．The strong winds are usually only in seine parts of it. It is also interesting to learn that it isn't very wet there（D）There is very little snow or rain．It snows on the ice Ill winter，but at other times Antarctica is dry，just like the Sahara Desert

    In winter the sea around Antarctica （E）changes into ice for thousands of kilometers．But scientists tell us that（F）地球在變暖．So in future，there may be less ice ill the Antarctic sea When that happens．our weather will never be the same again．

1．分別在A和C的空白處各填入一個適當(dāng)?shù)脑~：

2．寫出可以替換劃線部分B和E的同義詞或近義詞：

3．將劃線部分D改寫成__________  __________ snow or rain alot．

4．將劃線部分F譯成英語

5．寫出能說明本文主旨大意的中心詞語：