2018--2019学年人教版必修三Unit 5 Canada-The True North using language课时作业 (4)
2018--2019学年人教版必修三Unit 5 Canada-The True North using language课时作业 (4)第3页

  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