2．The scientists adapted them to their new life in the Antarctic.

　　them→themselves

　　3．This young man enjoys setting feet on inhospitable places.

　　feet→foot

　　4．The huntsman aimed his gun for the wolf and fired, but missed it.

　　for→at

　　Ⅴ.完形填空

　　So far, about 27 countries have visited Antarctica for scientific research. Hard __1__ the living conditions are, many scientists __2__ to stay there for long periods of research.

　　 So, how do they manage their lives on the ice?

　　 Well, during the __3__， the temperature in Antarctica reaches about －20℃. It falls to about －60℃ in winter. So, __4__ there are 24 hours of sunshine, scientists must keep wearing all the correct clothes to __5__ themselves from the cold. These clothes include jeans, running shoes, jackets，long underwear，boots and woolen socks.

　　 Although highly technical clothing provides much __6__ against the extreme cold, scientists often need to __7__ when there is an icy wind blowing and the temperature is －30℃. Natural protection such as facial (面部的) hair can also __8__.

　　 That's __9__ many researchers wear a __10__. It really does keep you warm.

　　 Usually, the polar researchers have __11__ meals. Some __12__ have feasts(盛宴) on holidays like Christmas and New Year's Day. __13__ are always welcomed and usually finished quickly.

　　 Life on the ice means living with other researchers in __14__ living space. Most people sleep in dorm－style rooms. Some remote field camps use __15__ tents. So, at least some researchers won't be __16__ by annoying snores(鼾声)．

　　 But what do they do for __17__ in their spare time? There are actually a lot of things they can do. They watch movies，read tons of books, listen to music, paint and ski. Some __18__ researchers might even do some knitting(编织)．

　　 It is important for a polar researcher to be in good physical condition. They can be required to __19__ to heights of more than 3 000 metres and the Antarctic atmosphere has less oxygen than that of any other __20__.

　　1．A.as 　　　　　　　　　B．but

　　C．because D．unless

　　解析：连词as在此引导一个让步状语从句。

　　答案：A

　　2．A.supposed B．used

　　C．ought D．have

解析：句意：尽管生活条件很艰苦，但很多科学家为了研究不得不在那儿待上很长一段时间。本文主要记述了在南极考察的科学家的生活情况，突出科学家的奉献精神。