题目内容
4.Polar bears live in environments too cold for most(41)animals(animal).For much of the year,they live and hunt on the (42)frozen(freeze) Arctic sea ice.Nature has prepared them for the cold conditions.But nothing has prepared the bears for the danger(43)that/whichthreatens the only home they know.The polar bears'world is melting.Studies show that the polar ice(44)has reduced(reduce) by 9.8% every 10 years since l978.Now about 20,000 to 25,000 polar bears live in the Arctic.Polar bears depend on the sea ice for their(45)survival(survive)."The sea ice is more(46)thanjust this platform that the bears walk over,"says Andrew Derocher,a scientist who studies North American polar bear populations."Without(47)it,they can't exist."
Some melting and refreezing of the polar ice is(48)natural(nature).But in a warmer world,these cycles speed up,and bears have(49)less(little) time to hunt.Normally,they have three months in the spring when they gain more weight.The extra fat is used(50)later(late),when the bears are not actively hunting.
分析 本文通过介绍北极熊所适应的生存环境以及由于全球变暖,使得北极熊赖以生存的世界正在逐渐融化,旨在说明目前北极熊的生存已经受到了严重的威胁.
解答 41.animals 42.frozen 43.that/which 44.has reduced 45.survival 46.than 47.it 48.natural 49.less 50.later
41.animals 考查名词.可数名词animal(动物)泛指,要用复数形式,作介词for的宾语.故填animals.
42.frozen 考查形容词.形容词frozen(冰封的)作定语,修饰名词Arctic sea ice,故填frozen.
43.that/which 考查关系代词.定语从句,先行词是danger (危险),要用关系代词that/which在从句中作语,故填that/which.
44.has reduced 考查时态.有时间状语since l978(自从1978年),所以要用现在完成时态:has reduced,故填has reduced.
45.survival 考查动词.名词 survival(幸存)作介词for的宾语.故填survival.
46.than 考查连词.句意:海冰不仅仅是熊走过的这个平台.固定词组:more than(不仅仅),故填than.
47.it 考查代词.句意:没有它,北极熊就不能生存.用代词it代替上文提到的The sea ice(海冰)故填it.
48.natural 考查形容词.形容词natural(自然的)作表语,故填natural.
49.less 考查形容词.句意:但是在一个温暖的世界里,这些周期加快,而熊就有更少的时间去打猎了.根据句意要用比较级less(更少),故填less.
50.later 考查副词.句意:这个平台过后就会被用到.副词later(后来,过后)作状语,故填later.
点评 语法填空是通过语篇在语境中考查语法知识的运用能力,在解题前应快速浏览短文掌握大意,在读懂短文的基础上,结合短文提供的特定的语言环境去逐句分析.要解决好语法填空,离不开坚实的语法知识,有了坚实的语法知识才能对语言进行正确的分析和判断,从而答对题目.