A.The heat from the sun can't escape,so the temperature is rising. B.Too much harmful light from the sun passes through the hole and reaches the earth directly, C.Some things we've done are very good for the earth while some are bad. D.Around the earth,there's a special kind of oxygen (O2) called"ozone"(O3). E.It mainly comes from different kinds of burning materials. |
分析 文章大意:这是一篇议论文,主要介绍现在地球污染严重,人们砍伐数以百万计的树木,汽车对空气的污染,工厂对土地和水源的污染,二氧化碳使地球变暖等等,诸如此类的问题对地球破坏很严重.因此我们必须采取措施阻止地球被污染.
解答 66.答案:C.选句题.根据上句but during this period we have changed our planet a lot in many ways但是这期间我们在许多方面改变了我们的星球.可知,应该说"我们做过的一些事情对地球很好,有些是坏的.",选C.
67.答案:D.选句题.根据下句But now air pollution is destroying it and that has made a very big hole in the ozone layer (臭氧层).但是现在空气污染正在破坏它,在臭氧层上形成了一个很大的空洞.可知,上句应该说"在地球周围,有一种特殊的氧气(O2)称为"臭氧"(O3)."它对地球很重要.选D.
68.答案:B.选句题.根据上句But now air pollution is destroying it and that has made a very big hole in the ozone layer (臭氧层).但现在空气污染正在破坏它,已经使臭氧层出现了一个非常大的洞(臭氧层).及下句his is very dangerous because it can cause cancer.它很危险,因为它会致癌.可知,应该说"太多来自太阳的有害光线,直接穿过黑洞,直接到达地球,".选B.
69.答案:E.选句题.根据上句Carbon dioxide (CO2)in the air has increased a lot.空气中的二氧化碳(CO2)增加了很多.可知应该说"它主要来源于不同的燃烧材料.".很多东西燃烧后会产生二氧化碳.故选E.
70.答案:A.选句题.根据上句it has formed a"blanket"(毛毯) around the earth.它在地球周围形成了一个"毯子".及下句This makes our earth become warmer and warmer.这使我们的地球变得越来越暖和.可知,应该说"太阳的热量无法逃脱,所以温度在上升.".选A.
点评 阅读选句,要注重句子与句子之间、段落与段落之间逻辑关系以及对篇章的整体理解.结合语境,根据所给句子,完成答案.
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