题目内容
5.Why Do Autumn Leaves Change Color?We all enjoy the colors of autumn leaves.(36)C To answer this questions,we first have to understand what leaves are and what they do.
Leaves are nature's food factories.Plants take water from the ground through their roots and take carbon dioxide from the air.(37)G Plants use the sugar as food for energy and as a building block for growing.The way plants turn water and carbon dioxide into sugar is called photosynthesis(光合作用).Chlorophyll (叶绿素)helps make photosynthesis happen.Chlorophyll is what gives plants their green color.
As summer ends and autumn comes,the days get shorter and shorter.(38)B
During winter,there is not enough light or water for photosynthesis.The trees will rest and begin to shut down their food-making factories.The green chlorophyll disappears from the leaves.As the bright green fades away,we begin to see yellow and orange colors.(39)D We just can't see them in the summer,because they are covered up by the green chlorophyll.
The bright reds and purples we see in leaves are made mostly in Autumn.In some trees,like maples,glucose(糖份) is trapped in the leaves after photosynthesis stops.(40)F The brown color of trees like oaks is made from wastes left in the leaves.
All these things make the beautiful colors we enjoy in Autumn.
A.Yellow and orange colors attract many of us in Autumn.
B.This is how the trees"know"to begin getting ready for winter.
C.Have you ever wondered how and why a fall leaf changes color?
D.Small amounts of these colors have been in the leaves all along.
E.For what reason do people prefer autumn leaves to summer leaves?
F.Sunlight and the cool nights of autumn make the leaves a red color.
G.Plants use sunlight to turn water and carbon dioxide into a kind of sugar.
分析 本文属于说明文阅读,作者通过这篇文章向我们介绍了秋天树叶颜色的变化以及变化的原因.
解答 36-40 CGBDF
36.C 细节理解题,根据前文We all enjoy the colors of autumn leaves可知我们喜欢秋天叶子的颜色,后文应该围绕这个描写,故选C.
37.G 细节理解题,根据前文Plants take water from the ground through their roots and take carbon dioxide from the air可知植物从根部吸收水分,从空气中吸收二氧化碳,后文应写植物利用阳光把水和二氧化碳转化为一种糖,故选G.
38.B 细节理解题,根据前文As summer ends and autumn comes,the days get shorter and shorter可知随着秋天的 到来,白天变得越来越短,此时树木就知道应该开始准备过冬,故选B.
39.D 细节理解题,根据前文As the bright green fades away,we begin to see yellow and orange colors可知,当明亮的绿色消失,我们开始看到黄色和橙色,这些颜色一直都在树叶上.故选D.
40.F 细节理解题,根据前文The bright reds and purples we see in leaves are made mostly in Autumn.可知我们可以在秋天看见红色和紫色的叶子,后文则开始描述树叶这样变化的原因,故选F.
点评 考查学生的细节理解和推理判断能力.做细节理解题时一定要找到文章中的原句,和题干进行比较,再做出正确选择.在做推理判断题时不要以个人的主观想象代替文章的事实,要根据文章事实进行合乎逻辑的推理判断.
Yes.Excellent.It is well worth seeing.( )
A. | For example | B. | If so | C. | If not | D. | In addition |
As she dressed,feeling her tight jeans,she (38)Ba ten-pound note in her pocket.Then her sister phoned with a(39)Astory.When she hurried out to the car-annoyed that she had to get petrol-she discovered her flat mate had already(40)D the tank for her.And this was a woman who thought she'd(41)Bbe happy.
Every day,it seems,we're(42)Awith advice about happiness.The cruel message is that there's something we're supposed to do to be (43)C(make the right choices,or have the right set of beliefs about ourselves.)
Coupled with this is the(44)D that happiness is a permanent condition.If we are not joyful all the time,we(45)Bthere's a problem.
Yet what most people(46)D is not a permanent state of happiness.It is something more ordinary,a(47)Aof what the American writer Hugh Prather once called"unsettled problem,ambiguous(48)Cand vague (不明确的) defeats with few moments of clear peace."
Maybe you wouldn't say yesterday was a happy day,(49)B,you had a quarrel with your boss.But weren't there moments of happiness,moments of(50)D?Now that you think about it.(51)A,there a letter from an old friend,or a stranger who asked where you got such a good haircut?You remember having a bad day,yet those good moments(52)C.
So in my opinion,happiness is an (53)B,not a condition.It's spending a pleasant hour organizing your closet.It is your family assembled at dinner.It's in the present not in the (54)Cpromise of a"someday when…".How luckier we are and how much more happiness we experience-if we can fall in love with the life we are (55)A.
36.A.already | B.still | C.never | D.often |
37.A.difficult | B.usual | C.typical | D.hard |
38.A.wasted | B.found | C.picked | D.got |
39.A.funny | B.sad | C.simple | D.dull |
40.A.moved | B.broke | C.covered | D.filled |
41.A.often | B.never | C.always | D.seldom |
42.A.flooded | B.troubled | C.covered | D.satisfied |
43.A.worried | B.successful | C.happy | D.angry |
44.A.question | B.condition | C.choice | D.thought |
45.A.wish | B.conclude | C.approve | D.agree |
46.A.care | B.do | C.ask | D.experience |
47.A.mixture | B.puzzle | C.belief | D.time |
48.A.memory | B.stories | C.victories | D.life |
49.A.so | B.because | C.since | D.but |
50.A.silence | B.waste | C.spirit | D.peace |
51.A.wasn't | B.was | C.isn't | D.is |
52.A.disappeared | B.worked | C.occurred | D.changed |
53.A.attitude | B.attitude | C.ache | D.attempt |
54.A.near | B.possible | C.distant | D.difficult |
55.A.living | B.making | C.doing | D.talking |