题目内容
17.Polar bears are suffering in a (61)warmer (warm) world.Polar bears live in environments too cold for most animals.(62)For/Duringmuch of the year,they live and hunt on the frozen Arctic sea ice.Nature has prepared(63)themfor the cold conditions.But nothing has prepared the bears for the danger that(64)threatens(threat) the only home they know.
The polar bears'world is melting.Studies show that the polar ice has reduced by 9.8% every 10 years(65)since1978.Now about 20,000to 25,000polar bears live in the Arctic.Polar bears depend on the sea ice for their(66)survial(survive)."The sea ice is more than just this platform that the bears walk over,"says Andrew Derocher,(67)ascientist who studies North American polar bear populations."(68)Withoutit,they can't exist."
Some melting and refreezing of the polar ice is natural.(69)Butin a warmer world,these cycles speed up,and bears have less time to hunt.Normally,they have three months in the spring when they gain more weight.The extra fat is used later,(70)whenthe bears are not actively hunting.
分析 文章介绍了北极熊面临的困境.原本生活在冰天雪地的北极熊,因为全球变暖,失去了它们的家园.气候变暖,冰雪的融化速度加快,北极熊没有那么多时间捕猎,它们正面临大自然的威胁.
解答 答案:61.warmer;考查比较级.文章讲述的是因为全球变暖,北极熊饱受痛苦,是一种暗含比较,要用形容词的比较级.
62.For/During;考查介词.句意表达的是一年中大部分时间,北极熊都生活在冰天雪地里.
63.them;考查代词.句意指代的是Polar bears,且作prepare的宾语,要用表示复数的代词宾格.
64.threatens;考查主谓一致.句中that指代的先行词是danger,抽象名词作主语,谓语动词要用单数.
65.since;考查介词.句中用的是现在完成时态,表示从…开始,要用since来连接时间状语.
66.survial;考查名词.句中有形容词性物主代词their修饰,要用名词形式.
67.a;考查冠词.句意表达的是泛指,要用不定冠词.
68.Without;考查介词.句意表达的是否定,且后接it,要用without来表示.
69.But;考查连词.句意表达的是转折.
70.when;考查连词.句意表达的是当…时候.
点评 语法填空题是考查学生的语言运用能力.解题时,要在理解文章的基础上,灵活运用语法知识,如词性,时态,名词单复数,连接词,代词,冠词等判断空白处应填写的内容.答完后,还要通读全文,核对所填单词形式是否正确,是否符合语境.
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