1、单元检测卷：Unit 4阅读下列短文，从每题所给的（A、B、C、D）中，选出最佳选项ACalifornia Condors Shocking RecoveryCalifornia condors are North Americas largest birds, with wind-length of up to 3 meters. In the 1980s, electrical lines and lead poisoning(铅中毒) nearly drove them to dying out. Now, electric shock training and medical trea
2、tment are helping to rescue these big birds. In the late 1980s, the last few condors were taken from the wild to be bred(繁殖) . Since 1992,there have been multiple reintroductions to the wild, and there are now more than 150 flying over California and nearby Arizona, Utah and Baja in Mexico. Electric
3、al lines have been killing them off. “As they go in to rest for the night, they just dont see the power lines,” says Bruce Rideout of San Diego Zoo. Their wings can bridge the gap between lines, resulting in electrocution(电死) if they touch two lines at once. So scientists have come up with a shockin
4、g idea. Tall poles, placed in large training areas, teach the birds to stay clear of electrical lines by giving them a painful but undeadly electric shock. Before the training was introduced, 66% of set-freed condors died of electrocution. This has now dropped to 18%. Lead poisonous has proved more
5、difficult to deal with. When condors eat dead bodies of other animals containing lead, they absorb large quantities of lead. This affects their nervous systems and ability to produce baby birds, and can lead to kidney(肾) failures and death. So condors with high levels of lead are sent to Los Angeles
6、 Zoo, where they are treated with calcium EDTA, a chemical that removes lead from the blood over several days. This work is starting to pay off. The annual death rate for adult condors has dropped from 38% in 2000 to 5.4% in 2011. Rideouts team thinks that the California condors average survival tim
7、e in the wild is now just under eight years. “Although these measures are not effective forever, they are vital for now,” he says. “They are truly good birds that are worth every effort we put into recovering them. ”1.California condors attract researchers interest because they .A.are active at nigh
8、t B.had to be bred in the wildC.are found on in California D.almost died out in the 1980s2. Researchers have found electrical lines are .A.blocking condors journey home B. big killers of Califorbnia condorasC. rest places for condors at night D. used to keep condors away3.According to Paraghaph 5 ,l
9、ead poisoning .A.makes condors too nervous to flyB. has little effect on condors kidneysC. can hardly be gotten rid of form condors bloodD. makes it difficult for condors to produce baby birds4.The passage shows that .A.the average survival time of condors is satisfactoryB.Rideouts research interest
10、 lies in electric engineeringC.the efforts to protect condors have brought good resultsD.researchers have found the final answers to the problemBTheir cheery song brightens many a winters day. But robins are in danger of wearing themselves out by singing too much. Robins are singing all night一as wel
11、l as during the day, British-based researchers say. David Dominoni, of Glasgow University, said that light from street lamps, takeaway signs and homes is affecting the birds biological clocks, leading to them being wide awake when they should be asleep. Dr Dominoni, who is putting cameras inside nes
12、ting boxes to track sleeping patterns, said lack of sleep could put the birds health at risk. His study shows that when robins are exposed to light at night in the lab, it leads to some genes being active at the wrong time of day. And the more birds are exposed to light, the more active they are at
13、night. He told people at a conference, There have been a couple of studies suggesting they are increasing their song output at night and during the day they are still singing. Singing is a costly behaviour and it takes energy. So by increasing their song output, there might be some costs of energy.
14、And it is not just robins that are being kept awake by artificial light. Blackbirds and seagulls are also being more nocturnal. Dr Dominoni said, In Glasgow where I live, gulls are a serious problem. I have people coming to me saying You are the bird expert. Can you help us kill these gulls?.During
15、the breeding(繁殖)season, between April and June, they are very active at night and very noisy and people cant sleep. Although Dr Dominoni has only studied light pollution, other research concluded that robins living in noisy cities have started to sing at night to make themselves heard over loud nois
16、e. However, some birds thrive(兴旺)in noisy environments. A study from California Polytechnic University found more hummingbirds in areas with heavy industrial machinery. It is thought that they are capitalising on their predators(天敌)fleeing to quieter areas.5.According to Dr D ominonis study, what ca
17、use robins to sing so much? A. The breeding season. B. The light in modern lifeC. The dangerous environment. D. The noise from heavy machinery.6.What is the researchers concern over the increase of birds song output? A. The environment might be polluted. B. The birds health might be damaged. C. The
18、industry cost might be increased. D. The peoples hearing might be affected.7.What does the underlined word nocturnal in Paragraph 5 mean? A. Active at night. B. Inactive at night. C. Active during the day. D. Inactive during the day. CDue to climate change, Arctic ice is breaking up earlier in the s
19、pring, and its area is decreasing. This is creating problems for polar bears that make their homes off northern Alaska and in Hudson Bay. Polar bears off Alaska normally hunt and raise their young on ice sheets that float on the ocean. But as the ice has melted, the polar bears have been forced to s
20、pend more time on land. There, they have begun to frequent beaches, feeding on the remains of whales caught by native hunters. For polar bears, this food is less nutritious than seals that they normally catch on ice sheets. The shrinking（减少） ice has also forced more polar bears into the ocean. In th
21、e past, they only had to swim short distances between ice sheets. But as the ice has shrunk, polar bears have been forced to swim longer and longer distances in the open ocean. This poses a severe danger during rough weather, and an increasing number of drowned polar bears have been observed. In Hud
22、son Bay, the ice breaks up three weeks earlier in the spring now than it did 20 years ago. Polar bears on Hudson Bay fast（绝食） during the summer, waiting for ice to form in the fall to hunt. Every year, the summer gets longer, and the bears get skinnier. Over the past 25 years, the average weight of
23、the female bears has dropped 68 kg. This loss affects their ability to reproduce, and already the number of births has dropped 15 percent. Unless the bears can learn to survive these climate changes, these giants of the ice may one day disappear.8.What is Arctic ice doing earlier each year?AIts free
24、zing.BIts hardening.CIts melting.DIts expanding.9.What is true of polar bears that are spending more time on land in Alaska?ATheir young are dying. BTheir diet is changing.CTheir health is improving. DTheir families are growing.10.What do polar bears in Hudson Bay do during the summer?AThey claim te
25、rritory(地域).BThey protect mates.CThey hunt animals.DThey stop feeding11.In which publication would you most likely find this passage?AMedical NewsBSociety TodayCWildlife JournalDDesign MagazineDWild animals are our friends, but many of them are getting fewer and fewer. We should try toprotect them.
26、The four animals below are now in danger.Tibetan Antelopes Tibetan antelopes (藏羚羊) are medium-sized animals. They mainly feed on grass. They areusually found in groups of about 20. They are killed for their wool, which is warm, soft and fineand can be made into expensive clothes. Although people can
27、 get the wool without killing theanimals, people simply kill them before taking the wool. The number of them is dropping year byyear. There are less than 75,000 Tibetan antelopes left in the world, down from a million 50 yearsago.Golden Monkeys Golden monkeys are mainly found in Sichuan, Gansu, Shan
28、xi provinces and Shengnongjiamountainous area of Hubei Province. Golden monkeys have golden-orange fur. They move aroundin the daytime, usually in groups of as many as 100 to 200 heads, or 20 to 30 heads. They feedon fruits and young leaves of bamboos. But people are destroying the environment where
29、 they live.Trees and bamboos are disappearing, so golden monkeys have less and less to eat.Elephans Elephants are very big and strong. They are bigger than any other animals on land. They aregrey and have long trunks and tusks. They have poor eyesight, but very good hearing and smell.They can lift h
30、eavy things and break down branches with their trunks. Elephants are very friendlytowards each other and towards their neighbours. Normally, they live in a group for many years.Young male elephants do not leave the group until they are about 12 years old. Now, there arevery few elephants in the worl
31、d. The number of them is becoming smaller and smaller becausetheir living areas are used for farming. Also, people hunt them for their tusks.Wolves Wolves are not very big. They have grey fur. Wolves have very good eyesight, hearing andsmell. Wolves food is vavious. They eat animals, insects and sna
32、ils. They are friendly to eachother and never attack people. They do not kill for fun. Wolves are in danger, too. They are losingtheir living areas because people cut down forests. Soon they will have no home or food.12. Tibetan antelopes usually live in groups of about _.A. 20 B. 30 C. 100 D. 20013
33、. Which of the following animals are the biggest on land?A. Tibetan antelopes. B. Golden monkeys. C. Elephants. D. Wolves14. Which of the following sentences is right?A. There are less than 7,500 Tibetan antelopes left in the world now.B. Golden monkeys usually move around during the night.C. Elepha
34、nts have good eyesight, but very poor hearing and smell.D. Wolves are friendly to each other and they never attack people.15. What can be the best title of the passage?A. Wild animals in danger B. How to hunt wild animalsC. Animals in the zoo D. How to train the animals七选五A lot of benefits can be se
35、en from getting enough rest，but for many of us，falling asleep can be challengingTheres plenty of advice about what to do to fall asleep16Herere some pre-bedtime activities that could be hurting your chance of sleeping well1ExerciseTake a hot showerExercise is a vital activity for your healthIt can a
36、ctually contribute to getting better-quality sleepThe problem，though，is that exercising within three hours of bedtime or taking a bath too close to the bedtime can raise your body temperature，and make it more difficult to fall asleep172Watch TVSurf the web18The bright lights of these screens can hol
37、d back the development of what promotes sleepSo close that laptop and turn off the TV about an hour before bed319Whatever schoolwork it is，it can certainly wait until morningGetting work down stimulates（刺激）your brain and can cause you unneeded stresspretty much the opposite of what you want to feel
38、if youre trying to fall asleep！4Read interesting storiesMany people have done this：youre reading a really interesting novel and suddenly its 2 am！Reading an interesting book before bed will make it difficult to fall asleep20APerhaps you need the most boring thing imaginable to read！BScreen time befo
39、re bed can disturb your ability to fall asleepCExercising or bathing，then，is best left for earlier in the dayDRealize the power of a good nights sleepESolve conflicts before you go to bedFBut what about not to do？GBusying yourself with work完形填空A thousand years ago Hong Kong was covered by a thick fo
40、rest like the forests we now find in Malaysia and Thailand. As more and more _21_ came to live in Hong Kong, these trees were cut down and burnt. Now there is no forest left, _22_ there are still some areas covered with trees. We call these _23_. Elephants, tigers, monkeys and many other animals use
41、d to live in the _24_ forests of Hong Kong, and there were even crocodiles in the _25_ and along the coast. When people came to live in Hong Kong, the animals began to _26_ out. Early farmers grew rice and kept pigs and chickens in the valleys. They _27_ the trees and burnt them. They needed fires t
42、o keep themselves _28_ in the winter, to cook their food, and to keep away from dangerous animals. Elephants quickly disappeared because there was not enough _29_ for them. So did most of the wolves, and tigers. Monkeys, squirrels and many other animals soon died out in the same _30_. You might thin
43、k that there are _31_ any animals in Hong Kong, except in the _32_. You might think there cant be any wild animals in such a _33_ place with so many cars and buildings. But there is _34_ a good deal of countryside in Hong Kong and New Territories, and there are still about thirty-six different kinds
44、 of animals living there. One of the most interesting _35_ is the barking deer. They are beautiful little creatures with rich, brown coat and a white patch under the tail. They look like deer but they are much _36_. They are less than two feet high. The male barking deer has two small horns but the
45、female has none. They make a _37_ rather like a dog barking. Barking deer live in thick shrub（灌木） country and are very good at _38_. They eat grass and shrubs, mainly in the very early morning and late afternoon and evening. This is when you are most likely to see one but you will need to be very qu
46、iet and to have very _39_eyes. In Hong Kong the barking deer has only one _40_ - man. Although it is illegal, people hunt and trap these harmless little animals. As a result there are now not many left. There are a few on Hong Kong Island but none in the New Territories.21:ApeopleBchildrenCladiesDwo
47、men22:AasBsinceCthoughDbecause23:AdesertBshadesCfieldsDwoods24:AthinBthickCshortDdying25:AriversBhillsCskyDmountains26:AdieBlookCcomeDget27:AplantedBlooked afterCcared forDcut down28:AcoldBcoolCwarmDhot29:AairBfoodCwaterDclothes30:AwayBroadCstreetDrail31:AneverBalwaysCnoDno longer32:AzoosBshopsCkitc
48、hensDparks33:AfreeBbusyCbigDlarge34:Ano moreBnearlyCstillDhardly35:AanimalsBplantsCfishesDbirds36:AgreatBlargerCsmallerDheavier37:AnoiseBvoiceCsongDliving38:AbarkingBeatingCplantingDhiding39:AcommonBsharpCclearDbig40:AneighborBbrotherCenemyDfriend语法填空Dinosaurs died out because of an unexpected incid
49、ent. But wildlife today disappears or is in danger just because humans do harm to it. For example, tigers 41 （hunt） for fur to make carpets so that they can only live in secure reserves; grassland is destroyed without mercy so that dust storms come into being, 42 (affect) distant cities. Last year,
50、scientists saw some monkeys 43 (rub) themselves with 44 certain kind of insects to protect themselves from fierce mosquitoes biting. According to the result of the 45 (inspect), they found that the insect contains a 46 (power) drug, so local farmers were employed to catch the insects. The ending was
51、 47 the insects disappeared from the whole zone. When told that it was 48 loss to humans, the farmers burst into 49 (laugh) and responded, “Our real loss is our decreasing income.” We should appreciate the natural balance and pay more attention to the 50 (important) of wildlife protection. Not until
52、 we succeed in letting wildlife live in peace, can we smile in relief and live a peaceful life.短文改错 When I was a child, I hoped to live in the city. I think I would be happy there. Now I am living in a city ,but I miss my home in countryside. There the air is clean or the mountains are green. Unfort
53、unately, on the development of industrialization, the environment has been polluted. Lots of studies have been shown that global warming has already become a very seriously problem. The airs we breathe in is getting dirtier and dirtier. Much rare animals are dying out . We must found ways to protect
54、 your environment. If we fail to do so ,well live to regret it .Unit 4阅读理解：第一篇 DBDC 第二篇 BBA 第三篇 CBDC 第四篇 ACDA七选五：FCBGA完形填空：21-25: ACDBA 26-30: ADCBA 31-35: DABCA 36-40: CADBC语法填空：41. are hunted 42. affecting 43. rubbing 44. a 45. inspection 46. powerful 47. that 48. a 49. laughter 50. importance短文改错：51. think thought 52. countryside前加the 53. orand 54. onwith 55. been去掉56. seriouslyserious 57. airsair 58. muchmany 59. foundfind 60. yourour
