17.To understand why the Earth is warming up,first of all,we need to understand why it is warm.Our planet is covered with atmosphere (大气).Sunlight passes through the atmosphere and reaches the Earth.The Sun heats up the Earth's surface.When the heat rises into the air,it is stopped by some special gases (气体)in the atmosphere like GOz,the heat returns to the Earth and keeps it warm.
Power stations and cars release (释放)so many greenhouse gases every day.So we can help stop global (全球的)warming by using less electric things such as turning off lights when we leave a room,asking our parents to turn down the heating in our house to save energy.We can also stop global warming by finding other ways of transportation.For example,ride a bicycle or walk instead of going by car,Another way to help stop global warming is to plant and care for trees.Because trees take in C02,they are our best friends when fighting against global warming.
The problem of global warming cannot be solved in a day.It may take a long time to find clean energy,such as wind energy.It may take a long time to plant the trees again we are cutting down.But every little thing each person can do to save energy and our forests will help.Think a-bout our planet.Think about ways we can help make the Earth a safe and comfortable place for the future.
52.The underlined word"it"meansB in the first paragraph.
A.the heat
B.the Earth
C.the sunlight
D.the atmosphere
53.B ways are mentioned to stop global warming according to the second paragraph.
A.Two
B.Three
C.Four
D.Five
54.Which of the following is NOT trueB?
A.Everybody can help save energy and our forests.
B.The problem of global wanning can not be solved.
C.To find clean energy will help solve the problem of global warming.
D.The writer wants us to pay attention to the problem of global warming.
55.Which is the best title of this passageC?
A.Why is the Earth warming up
B.When can we stop the Earth from warming up
C.How can we stop the Earth getting warmer
D.How long will it take to stop the Earth getting warmer.
分析 为了了解为什么地球正在升温,首先,我们需要明白为什么它是温暖的.我们的星球被大气覆盖.阳光能通过大气到达地球.太阳加热了地球的表面.当热量升到空气中时,它会被大气中的一些特殊气体所阻挡,如 GOz,热量返回地球并保持温暖.
发电站和汽车每天释放如此多的温室气体.因此,我们可以通过使用较少的电子物品来帮助停止全球变暖,例如在离开房间时关闭灯光,让我们的父母调低加热器来节省能源.我们也可以通过寻找其他交通方式来阻止全球变暖.例如,骑自行车或步行而不是开车.另一种帮助阻止全球变暖的方式是植树和爱护树木.因为树木吸收二氧化碳,是我们对抗全球变暖的最佳朋友.
全球变暖的问题在一天内是无法解决的.可能需要很长时间才能找到清洁能源,如风能.可能需要很长时间才能将我们砍伐的树重新种植.但是每个人做的每一件小事都可以做到节约能源,并且我们的森林将会有所帮助.了解我们的星球.想出一些方式,我们能帮助地球成为未来安全舒适的地方.
解答 52.B.判断推理题.根据To understand why the Earth is warming up,we need to understand why it is warm可知,要了解地球为什么变暖,我们需要明白它为什么是暖和的;再根据the heat returns to the Earth 可知,热量达到地球才会让地球温暖,故这里的it应是指地球.故选B.
53.B.判断推理题.根据题干可知,文章提到了三种阻止地球变暖的方式,分别是:by using less electric things,by finding other ways of transportation和 to plant and care for trees.故选B.
54.B.判断推理题.根据The problem of global warming cannot be solved in a day以及第三段整段文意可知,解决全球变暖不是短期能解决的,但也不是不能解决的,只是需要一个长期的过程.故选B.
55.C.主旨大意题.通过阅读全文可知,本文讲述了全球变暖的原因,并重点讨论了如何解决全球变暖问题.故本文的题目最好是我们应该如何阻止全球变暖.故选C.
点评 做本题时,首先对原文材料迅速浏览,掌握全文的主旨大意. 其次,细读题材,各个击破.掌握全文的大意之后,细细阅读每篇材料后的问题,弄清每题要求后,带着问题,再回到原文中去寻找、捕获有关信息.