Unit 2 Wildlife Protection单元复习练习-高中英语人教版（2019）必修第二册.docx

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1、高一人教版英语必修二Unit 2 Wildlife Protection单元复习练习一、阅读理解：AOn a day in Arkansas, some fishermen saw a bear cub(幼兽)in a tree. As hours went by, its mother didnt return. So they called wildlife biologist(生物学家) Eastridge.The bear cub was sick and hungry, weighing only 5 pounds and with his eyes not completely o

2、pen. Eastridge called Lisa Stewart, who works at Appalachian Bear Rescue in Tennessee. Stewart always makes room for a new cub.She named the bear Miracle because she thought it was a miracle that he had survived! As soon as she could, she stopped having contact with the cub so he would not become to

3、o used to humans. When the cub arrived, Stewart cleaned his eyes and put him in a house alone. Since Miracle was already 5 months old. Stewart gave him bowls of food and another bowl of a special formula(配方奶粉), similar to a bear mothers milk. Sometimes, Miracle would reach his head out of his house

4、and take some formula or food. But he wasnt eating too much.Miracle was too weak to be with other bears. So Stewart gave him a toy bear named Buddy. He took it into his house and covered it with straw(稻草). He fed Buddy, too. Stewart often found the toy covered in formula and berries and its ears ful

5、l of apple chunks. Now that Miracle had Buddy, he came out of his house more often and wanted to eat.After two months, Stewart introduced Miracle to other bears so they could learn from one another. She avoided any direct contact with Miracle and the other bears. Stewart wanted to make sure they sta

6、yed afraid of humans so they could go back into the wild again. She always hid behind a fence(栅栏) and threw food over the top secretly. The bears hunted for this food as they would soon do in the wild.Five months later, Rick Eastridge returned to pick up a healthy 90-pound Miracle and another bear f

7、rom Arkansas named Rocky. Eastridge loaded the bears into boxes on his truck and transported them back to the wild. As soon as the bear boxes were opened, the two cubs ran for the woodswhere they belonged.Q.What did Stewart do shortly after the cub arrived?_A.She helped him eat food.B.She contacted

8、with him.C.She settled him down.D.She named him Miracle.2.A toy bear was given to Miracle in order to_.A.remind him not to waste his foodB.kill his lonely time in his house.C.develop his skills of making friendsD.rid Miracle of its fear of humans3.Why did Stewart always give food to Miracle in secre

9、t?_A.Because he could learn how to find food in the wild.B.Because he was too weak to be frightened by humans.C.Because a good relationship could be developed.D.Because she didnt want to disturb his peaceful life.BGeorge was a game warden(猎物繁殖和旗保护区的管理员) in Kenya. One day, he found three tiny lions b

10、eside a dead lioness. They were so little that their eyes had not yet opened. Sadly, he took the three little lions and drove back home. When George got out of the car with the baby lions, his wife Joy Adamson immediately took over. Joy had cared for many young animals over the years .but she had ne

11、ver tried to raise baby lions! However, she was determined to save these babies. The lions grew rapidly. But as the lion grew bigger and stronger, Joy and George realized they could not keep three large lions. They decided to present two of the lions to a zoo; they would keep the smallest lion, whic

12、h they named Elsa. Joy and George taught Elsa to hunt and to protect herself. Elsa liked to play with her human friends, but as Elsa grew to her adult size, this play became dangerous. More than once, Elsa knocked Joy to the ground, scratching(抓伤) her. Joy and George both realized that it was lime t

13、o find Elsa a new home. They knew she needed a wild home where she could live the life she was horn to lead. Finally, Joy and George decided to set Elsa free in Meru Park at the foot of Mt. Kenya. Elsa never forgot Joy and George. Whenever they camped nearby, Elsa would come to visits rubbing her he

14、ad against their legs in greeting. Joy missed Elsa, but was happy that she had made a successful life as a wild lion. Joy wrote a book about Elsa, Born Free, which became an international bestseller. Joy traveled all over the world, talking about the importance of saving the wild animals of the worl

15、d. Joy lived out her life in Africa, working with wild animals. She wrote more books about her experiences. Her heart felt interest in animals and her great love for Elsa helped inspire(激发) a worldwide movement to protect wildlife. For Joy Adamson, there was no greater gift than the beauty and spiri

16、t of wild animals, living free.4.When George took the three lions home, his wife _.A.advised him to give them to a zoo B.was frightened by their appearancesC.was unwilling to care for them D.had a great love for them5.Joy and George set Elsa free because _.A.Elsa scratched Joy B.there wasnt enough f

17、ood for ElsaC.Elsa was big and strong D.Elsa was a danger to their neighbors6.What do we know about the book Born Free from the text?A.It became very popular.B.It is mainly about Joys experiences in Meru Park.C.It focuses on wild animals in Kenya.D.It helped change peoples attitudes towards wildlife

18、.7.Whats the best title for the text?A.Joy Adamson: living with lions B.Elsa: lion raised by a humanC.Bom Free: a wonderful book D.George: a game wardenCHow does an ecosystem(生态系统) work? What makes the populations of different species the way they are? Why are there so many flies and so few wolves?

19、To find an answer, scientists have built mathematical models of food webs, noting who eats whom and how much each one eats. With such models, scientists have found out some key principles operating in food webs. Most food webs, for instance, consist of many weak links rather than a few strong ones.

20、When a predator(掠食动物) always eats huge numbers of a single prey(猎物), the two species are strongly linked; when a predator lives on various species, they are weakly linked. Food webs may be dominated by many weak links because that arrangement is more stable over the long term. If a predator can eat

21、several species, it can survive the extinction of one of them. And if a predator can move on to another species that is easier to find when a prey species becomes rare, the switch allows the original prey to recover. The weak links may thus keep species from driving one another to extinction. Mathem

22、atical models have also revealed that food webs may be unstable, where small changes of top predators can lead to big effects throughout entire ecosystems. In the 1960s, scientists proposed that predators at the top of a food web had a surprising amount of control over the size of populations of oth

23、er speciesincluding species they did not directly attack. And unplanned human activities have proved the idea of top-down control by top predators to be true. In the ocean, we fished for top predators such as cod on an industrial scale, while on land, we killed off large predators such as wolves. Th

24、ese actions have greatly affected the ecological balance. Scientists have built an early-warning system based on mathematical models. Ideally, the system would tell us when to adapt human activities that are pushing an ecosystem toward a breakdown or would even allow us to pull an ecosystem back fro

25、m the borderline. Prevention is key, scientists say because once ecosystems pass their tipping point(临界点), it is remarkably difficult for them to return.8. What have scientists discovered with the help of mathematical models of food webs?A. The living habits of species in food webs.B. The rules gove

26、rning food webs of the ecosystems.C. The approaches to studying the species in the ecosystems.D. The differences between weak and strong links in food webs.9. A strong link is found between two species when a predator _.A. has a wide food choiceB. can easily find new preyC. sticks to one prey specie

27、sD. can quickly move to another place10. What will happen if the populations of top predators in a food web greatly decline?A. The prey species they directly attack will die out.B. The species they indirectly attack will turn into top predators.C. The living environment of other species will remain

28、unchanged.D. The populations of other species will experience unexpected changes.11. How does an early-warning system help us maintain the ecological balance?A. By getting illegal practices under control.B. By stopping us from killing large predators.C. By signaling the urgent need for taking preven

29、tive action.D. By bringing the broken-down ecosystems back to normal.DMore and more birds are flying to settle at Qinghai Lake, one of the highest inland lakes in China, thanks to the protection efforts of the local government. Covering an area of over 4,000 square kilometers, Qinghai Lake is also t

30、he countrys biggest salt lake.Located in Northwest Chinas Qinghai Province, the lake is famous for the two islands at its northwest pointCormorant Island and Egg Island. The two islands have plenty of floating grass and various schools of fish, offering rich food sources to birds. The islands have b

31、ecome a dreamland for different kinds of groups of birds and have been called “Bird Islands”.Each March and April, when ice and snow covering the Qinghai-Tibet Plateau(高原) start to melt, over 20 kinds of birds fly to the Bird Islands to lay eggs. During the months, flocks of birds cover the whole sk

32、y over the islands and bird eggs can be found everywhere. Visitors can hear the singing of birds from miles away. These have become a world-famous symbol of the lake.To protect this dreamland for birds and support calls for ecological protection, China set up the Qinghai Lake National Natural Reserv

33、e at the end of 1997.Meanwhile,the State has pointed out the Bird Islands and Spring Bay of Qinghai Lake were central protection zones.Inspectors and conservators often patrol the lake, enriching local residents knowledge of related laws and spreading knowledge about animal protection to visitors. T

34、hey are making great efforts to call on people to love and protect the birds. At the same time, they have built special fences around the island area to prevent wolves, foxes and other carnivorous animals, as well as illegal hunters from breaking up the birds building nests, laying eggs and breeding

35、. As a result, more and more birds are coming to the islands for sheltering and breeding.12.Why are more and more birds coming to the biggest salt lake in Northwest China?A.Because it is getting warmer and warmer.B.Because it is being reformed.C.Because environments there are getting more and more a

36、greeable to them to live in.D.Because the people there are becoming richer and richer.13.What do the birds feed on?A.Floating fish and various grass.B.Grass floating on the water surface and different kinds of fish.C.Salt water and plenty of grains.D.Corn from the local farmers.14.What can you infer

37、 according to the passage?A.Over 20 kinds of birds come to the Bird Islands before March.B.Flocks of birds fly up to the whole sky over islands to lay eggs.C.Visitors can see the birds from miles away.D.The government has taken many measures to protect the district.15.Where is this passage most prob

38、ably taken from?A.A newspaper.B.A document.C.A storybook.D.A science book.二、短文七选五：Where Do Mosquitoes(蚊子)Go in Winter?Why do mosquitoes，everywhere in warmer months，disappear completely in winter？ 1 Mosquitoes are coldblooded insects，meaning that they dont like the cold and prefer temperatures that a

39、re 80 degrees Fahrenheit (华氏温度) or more.When the temperature drops，they actually lose their ability to fly and become motionless.2 They would never be able to fly far enough.The actual answer to the question is different for male and female mosquitoes.Male mosquitoes? They die.But thats not just bec

40、ause of the cold.Male mosquitoes have far shorter lifespans(寿命) than females，and they die in autumn.Female mosquitoes，though，can live through the winter.They hibernate (冬眠)In autumn，the females will go into hollow logs or cracks in the ground and enter this still state. 3 They put off their developm

41、ent，typically for months.When it warms up again，the females will come out from hibernation.At this point，theyre getting ready to lay their eggs and they need as much blood as possible to help the eggs develop.The females must find a blood meal to provide the protein needed by their eggs to develop，j

42、ust in the time，when humans are outdoors in short sleeves enjoying the warming weather. 4 It actually doesnt have to be what we humans would consider “cold” to put a mosquito in danger.While these pests live actively when its around 80 degrees F，most species can start heading into hibernation when i

43、t drops to around 50. 5 This is when female mosquitoes start looking for a place for sleep.AThe obvious answer is that its cold.BNow its time for male mosquitoes to wake up.CIts only the female mosquitoes that are biting you.DUnlike birds，mosquitoes dont fly south for the winter.EAnything below 50 d

44、egrees is already too cold for most mosquitoes.FThey carry on with life only when there is enough water for their needs.GThey can hibernate for up to six months in freezing or waterless conditions.三、完形填空：Growing up in the USA, I always wanted to experience another culture. The _1_ came when I was 15

45、. After a few months of planning and _2_, I was ready to spend the second semester of my first high school year _3_ an exchange student in Australia. _4_ in Perth was one of the most exciting moments of my life. I realized then that there was no turning back. The family I would live with was waiting

46、 for me, and it would only be five days _5_ the new school year. The school I attended was _6_ my school back in the States. I was quite _7_ at first, especially never having been to a new school even in the US. Everything went without _8_, though. The teachers were welcoming and the students were f

47、riendly. The most _9_ time was travelling with other exchange students around Australia during our semester break. The few weeks we _10_ together were full of amazing activities. At the end of our _11_ in Australia, we had three weeks to share our stories and help each other deal with leaving. It wa

48、s _12_ that our last day together was filled with tears. We packed our camp, _13_ e-mail addresses and gathered together for a final good-bye. Upon coming home, an open mind was again important. Resettling home took time and _14_, but at last I made it. All the while, I was thoughtful to letting my family and friends know how happy I was to be home and how much I had missed them though the experience is still _15_ with me. So, if you have the opportunity to study abro