1、Unit 4 Global warming 单元加餐练.完形填空Are forests always created by nature? A man from India proves that this is not necessarily _1_ .Abdul Kareem, who used to be an airline ticketing agent, has a great love for the _2_. _3_ he never went to college, he can talk about plants and trees like an expert. In 1
2、977, he bought a piece of _4_ wasteland with the dream of growing trees on it. In the beginning, people thought he was _5_ to waste his time and money on the land. But he simply _6_ them and kept _7_ the soil and planting trees there. The land was so dry that it had to be _8_ several times a day. Ka
3、reem had to _9_ the water from a source that was a kilometer away. In the first two years, none of the trees he planted _10_. However, in the third year, several young trees started growing. Greatly _11_ by the result, Kareem planted more trees and his manmade forest began to _12_.Kareem let his for
4、est grow _13_， without using any chemicals to help it grow or _14_ insects. He _15_ the ability of nature to renew _16_. Thats _17_ he did not allow fallen leaves or twigs from the forest to be removed.After years of hard work, Kareem has not only realized his dream _18_ transformed a piece of deser
5、ted property into a beautiful forest as well. Today, his forest is _19_ to 1,500 medicinal plants, 2,000 varieties of trees, rare birds, animals, and insects. Now, scientists from all over the world come to visit his _20_. They hope to find the secret of his success.篇章导读：本文是一篇记叙文。印度人Abdul Kareem放弃了航
6、空票务代理的工作，在一片荒地上种植树苗。经过数年艰苦的努力，树苗开始存活，并自然成长为一片漂亮的具有巨大经济效益的森林。1A.possible Btrue Ctroublesome Dimportant答案：B根据该句中的“not necessarily”并结合下文内容可知，森林总是由大自然缔造的这一观点并不一定是真的，故B项正确。2A.weeds Bflowers Cwoods Danimals答案：C根据下句中的“he can talk about plants and trees like an expert”可知，他能像专家那样谈论植物和树木；据此可以判断，他非常喜欢树林，故C项正确。
7、3A.Because BEver since CAs ifDAlthough答案：D由前后分句中的“never went to college”和“like an expert”可知，前后分句之间为让步关系，although意为“尽管”，引导让步状语从句，故D项正确。4A.rockyBrich Cgreen Dmuddy答案：A根据该句中的“wasteland”以及下句中的“waste his time and money on the land”可知，人们认为在这片荒地上种树浪费时间和金钱；据此可以判断，这是一片不毛之地。rocky意为“多岩石的”，符合语境，故A项正确。5A.funnyBc
8、razyCworried Dbrave答案：B根据该句中的“waste his time and money on the land”可知，刚开始时，人们认为他在这片荒凉的土地上种树一定是疯了。crazy意为“疯狂的”，故B项正确。6A.influenced BseparatedCchanged Dignored答案：D根据该句中的“simply . and planting trees there”可知，他不顾别人的议论，继续在这片贫瘠的土地上种树。ignore意为“忽视，不予理睬”，故D项正确。7A.working out Bworking onCtaking out Dtaking on
9、答案：B根据该句中的“simply . and planting trees there”可知，他不顾别人的议论，努力改善土壤状况，继续在这片土地上种树。work on意为“努力改善(或完成)”，故B项正确。8A.turned Bdug Cwatered Dcovered答案：C根据该句中的“The land was so dry that it had to be”可知，土地太干，所以每天要浇几次水。water作动词，意为“浇水”，故C项正确。下句中的“the water”是提示。9A.fetchBtransport Ctake Ddrive答案：A根据该句中的“the water from
10、 a source that was a kilometer away”可以判断，Kareem不得不到一公里以外的地方去取水。fetch意为“(去)取来”，故A项正确。10A.died Bincreased Cburst Dsurvived答案：D根据下句“However, in the third year, several young trees started growing.”然而在第三年一些树苗开始生长；据此可以判断，前两年没有树苗存活。survive意为“存活”，故D项正确。11A.surprised Bhurt Cencouraged Dmoved答案：C根据该句中的“by th
11、e result，Kareem planted more trees”可以判断，受到那些开始生长的树苗的鼓舞，Kareem种植了更多的树苗。encourage意为“鼓励，激励”，故C项正确。12A.take place Btake shapeClose way Dlose control答案：B根据该句中的“Kareem planted more trees”可知，Kareem种植了更多的树，他的人造森林开始成形。begin to take shape意为“开始成形”，故B项正确。13A.smartly Bpainfully Cexcitingly Dnaturally答案：D根据该句中的“w
12、ithout using any chemicals to help it grow”可知，Kareem不使用化肥助长；据此可以判断，他是让森林自然生长。naturally意为“自然地”，故D项正确。14A.cook Bspread Ckill Dkeep答案：C根据该句中的“without using any chemicals to help it grow”可知，他不使用化学药品杀虫。kill意为“杀死”，故C项正确。15A.believed in Blearned fromCthrew awayDgave up答案：A根据上句所述他让森林自然生长可知，他相信自然的力量。believe
13、in意为“相信”，故A项正确。16A.himself Bthem CitselfDus答案：C该句中的renew意为“更新”，从他种树的方法可知他相信大自然自我更新的能力。空处代指nature，故用itself。17A how BwhenCwhetherDwhy答案：D分析该句结构可知，空处引导表语从句，Thats because后接原因，意为“那是因为”，Thats why强调结果，意为“那是的原因”。由空后的“he did not allow fallen leaves or twigs from the forest to be removed”可知，该句强调结果：他不清理森林中的落叶和
14、树枝，故用why引导该从句。18A.andBso Cor Dbut答案：D经过数年的辛苦工作，Kareem不但实现了他的梦想，还将一片废弃的荒地改造成为漂亮的森林。not only . but (also)为固定搭配，意为“不但而且”，故D项正确。19A.house Bhome ClandDfarm答案：B如今，他的森林成了多种药用植物、树种以及珍稀鸟类、动物、昆虫的家园。be home to为固定搭配，意为“是的家园”。20A.creature Bpark Ccreation Dnature答案：C根据语境可知，来自世界各地的科学家到这里参观他创造的森林。creation意为“创造物”，故C
15、项正确。.阅读理解AYou might think that “global warming” means nothing more than a rise in the worlds temperature. But rising sea levels caused by it have resulted in the first evacuation (撤离) of an island nation. The citizens of Tuvalu will have to leave their homeland.During the 20th century, sea level ros
16、e 812 inches. As a result, Tuvalu has experienced lowland flooding of salt water that has polluted the countrys drinking water.Paani Laupepa, a Tuvaluan government official, reported to the Earth Policy Institute that the nation suffered an unusually high number of fierce storms in the past ten year
17、s. Many scientists connect higher surface water temperatures resulting from global warming to greater and more damaging storms.Laupepa expressed dissatisfaction with the United States for refusing to sign the Kyoto Protocol, an international agreement calling for industrialized nations to reduce the
18、ir greenhouse gas emissions (减少温室效应气体排放), which are a main cause of global warming. “By refusing to sign the agreement, the US has effectively taken away the freedom of future generations of Tuvaluans to live where their forefathers have lived for thousands of years，” Laupepa told the BBC.Tuvalu has
19、 asked Australia and New Zealand to allow the gradual move of its people to both countries.Tuvalu is not the only country that is vulnerable (易受影响的) to rising sea levels. Maumoon Gayoon, president of the Maldives, told the United Nations that global warming has made his country of 311,000 an “endang
20、ered nation”篇章导读：本文是一篇说明文。文章主要讲述了全球变暖引起海平面上升，给一些国家带来的不利影响。1The text is mainly about _ .Arapid changes in earths temperatureBbad effects of global warmingCmoving of a country to a new placeDreasons for lowland flooding答案：B主旨大意题。这篇短文主要讲述了全球变暖造成的恶劣影响。2According to scientists, the DIRECT cause of more a
21、nd fiercer storms is _ .Agreenhouse gas emissions in industrialized nationsBhigher surface water temperatures of the seaCcontinuous global warmingDrising sea levels答案：B细节理解题。根据第三段中的“Many scientists connect higher surface water temperatures resulting from global warming to greater and more damaging s
22、torms.”可判断出，造成更大和更具破坏性的暴风雨的直接原因是源自全球变暖的海洋表面水温变得更高。3Laupepa was not satisfied with the United States because it did not _ .Aagree to reduce its greenhouse gas emissionsBsign an agreement with TuvaluCallow Tuvaluans to move to the USDbelieve the problems facing Tuvalu were real答案：A细节理解题。由第四段第一句话可知，Lau
23、pepa对美国不满意的原因是美国拒绝签署减少温室效应气体排放的公约。4The country whose situation is similar to that of Tuvalu is _ .AAustralia BNew ZealandCthe Maldives Dthe United States答案：C细节推断题。根据最后一段可判断出the Maldives与Tuvalu的境况相似。BIn the atmosphere, carbon dioxide allows the suns rays to enter but prevents the heat from escaping.
24、According to a weather experts prediction, the atmosphere will be warmer in the year 2050 than it is today, if man continues to burn fuel at the present rate. If this warming up took place, the ice caps in the poles would begin to melt, thus raising sea level several meters and severely flooding coa
25、stal cities. Also, the increase in atmospheric temperature would lead to great changes in the climate of the northern hemisphere.In the past, concern about a manmade warming of the earth has concentrated on the Arctic because the Antarctic is much colder and has a much thicker ice sheet. But the wea
26、ther experts are now paying more attention to West Antarctic, which may be affected by only a few degrees of warming, in other words, by a warming on the scale that will possibly take place in the next fifty years from the burning of fuels. Satellite pictures show that large areas of Antarctic ice a
27、re already disappearing. The evidence suggests that a warming has taken place. This fits the theory that carbon dioxide warms the earth.However, most of the fuel is burnt in the northern part of the earth, where temperatures seem to be falling. Scientists conclude, therefore, that up to now natural
28、influences on the weather have exceeded those caused by man. The question is: Which natural cause has the most effect on the weather?One possibility is the behavior of the sun. Astronomers at one research station have studied the “hot” spots and “cold” spots, that is, the relatively less hot spots,
29、on the sun. This seems to have a greater effect on the distribution of the earths atmospheric pressure, and consequently on wind circulation (循环). The sun is also variable (可变的) over a long term. Its heat output (输出) goes up and down in cycles. The latest trend being downward is on the way. But that
30、 is only an imagination.篇章导读：本文是一篇说明文。文章主要介绍了影响气候变暖的诸多原因，包括人类活动和太阳运动。5The carbon dioxide in the atmosphere would _ .Aprevent the suns rays from reaching the earths surfaceBmean a warming up in the ArcticCaccount for great changes in the climateDraise the temperature of the earths surface答案：D细节理解题。文章
31、第一段讲到二氧化碳在大气中吸收太阳的光线并阻挡热量的流失，文章第二段最后一句话又再次提到二氧化碳能使地球变热的理论。因此，答案为D项。6Although the fuel is greater in the northern part, temperatures there seem to be falling. This is _ .Amainly because the carbon dioxide is risingBpossibly because the ice caps in the poles are meltingCdue to the effect of the earths
32、 climateDpossibly due to the activity of the sun答案：D细节理解题。文章第三段提及这一现象时讲到，科学家们认为：这一现象的产生是因为到目前为止自然界对天气的影响要大于人类对天气的影响。而究竟是哪种自然力量对天气的影响最大呢？文章第四段第一句话给出了答案：其中一个可能就是太阳的活动。D项与此意相符。7What does the underlined word “exceeded” mean?ATo be the same as. BTo be slower than.CTo be better than. DTo be bigger than.答案
33、：D词义猜测题。由画线词所在句子中的“natural influences”和下一句中的“which natural cause has the most effect”及最后一段的第三句可知，自然界对天气的影响要大于人类对天气的影响。故选D项。8The article was written to explain _ .Athe greenhouse effectsBthe solar effects on the earthCthe solar weatherDthe causes affecting weather答案：D主旨大意题。全文讲述的是影响天气的诸多原因。只有D项符合题意。.短
34、文改错The number of the old living alone have increased incredibly fast in recent years, with the percentage near 50 percent of all. This is a social phenomena. The reasons include population migration, decrease of multigenerational families, development of cities and parents preference for freedom.As
35、a result, some social problems have been arisen such as loneliness, lack of care and difficulties of living. So it is our responsibility care about the old in terms of their physical health and feelings. We should visit them as often as possible beside phoning. Whats more, do try to keep they compan
36、y whenever possibly.All in all, its high time that we take the responsibility to show our concern at the old and make their life enjoyable.答案：The number of the old living alone increased incredibly fast in recent years, with the percentage near 50 percent of all. This is a social . The reasons inclu
37、de population migration, decrease of multigenerational families, development of cities and preference for freedom.As a result, some social problems have arisen such as loneliness, lack of care and difficulties of living. So it is our responsibility care about the old in terms of their physical healt
38、h and feelings. We should visit them as often as possible phoning. Whats more, do try to keep company whenever .All in all, its high time that we the responsibility to show our concern the old and make their life enjoyable.1havehas考查主谓一致。由前面的“The number of”可知，谓语动词应用第三人称单数形式。2phenomenaphenomenon考查名词的
39、数。由前面的“a social”可知此处表示“这是一种社会现象”，故应用单数名词。3parentsparents考查名词所有格。根据名词preference可知，此处应用名词的所有格形式。4去掉been考查语态。problems为arise这一动作的执行者，应用主动语态，故去掉been。5care前加to考查固定用法。Its ones responsibility to do sth. “做某事是某人的责任”。6besidebesides考查介词。beside “在旁边”，而besides “除之外(还)”。根据语境可知，此处应用besides。7theythem考查代词。作动词keep的宾语，故应用宾格them。8possiblypossible考查形容词。分析句子结构可知，此处为省略句，补充完整则为：whenever it is possible，故用possible。9take前加should或taketook考查虚拟语气。It is (high) time that . 句型中从句谓语动词要用过去式或用“should动词原形”，should不可省略。10atfor/about/over考查介词。show ones concern for/about/over sth.表示“担心，忧虑”，为固定搭配。
