This is a good place for the to get outclass knowledge. 查看更多

 

题目列表(包括答案和解析)

完型填空

  Have you ever imagined that you could be cloned like Dolly the sheep in the not too distant future?

  The news that a human embryo (胚胎) has been 1 cloned for the first time has caused mixed reactions (反映).

  The 2 was carried out by scientists from the Advanced Cell Technology Inc (ACT), in Massachusetts, US. The group 3 the news on November 25.

  “This is 4 human being. A clone is alive, it walks, it breathes,” said Jamie Grifo, 5 on the study of cloning at New York University School of Medicine.

  “This is a set of cells in a lab that will be used to 6 someone's life. ”

  Such research could lead to treatment for 7 such as heart diseases, AIDS and even cancer, 8 scientists.

  Despite high hopes from other scientists, the news raised concerns immediately from religious and political leaders. Several 9 in the US do not allow human cloning. President George W. Bush also made it clear that he is 10  any type of human cloning. However, the scientists at ACT said they have no interest at present in 11 an early embryo into __12__.

  Animals have been cloned repeatedly since Dolly the sheep 13 in 1997. And there were no real technical 14 to stand in the way of scientists making a cloned human embryo.

  This time the research group used traditional cloning technology with a human 15

   16 it was given DNA from an adult cell, the egg began to __17__.__18__ it was stopped from becoming a baby--at a stage in which it was 19 a ball of cells. The 20 technology has been used to clone sheep, cattle and monkeys.

(1)

[  ]

A. in failure
B. never
C. successfully
D. not

(2)

[  ]

A. research
B. report
C. works
D. task

(3)

[  ]

A. made known
B. made
C. said
D. had

(4)

[  ]

A. a cloned
B. a man-made
C. a
D. not a cloned

(5)

[  ]

A. a worker
B. a head
C. an expert
D. an assistant

(6)

[  ]

A. save
B. rescue
C. cure
D. treat

(7)

[  ]

A. patients
B. health
C. diseases
D. things

(8)

[  ]

A. according to

B. including

C. besides

D. argued

(9)

[  ]

A. countries
B. nations
C. peoples
D. states

(10)

[  ]

A. for
B. against
C. researching for
D. praising

(11)

[  ]

A. developing

B. building

C. inventing

D. discovering

(12)

[  ]

A. a baby
B. a man
C. a woman
D. a white man

(13)

[  ]

A. died
B. appeared
C. turned up
D. was no more

(14)

[  ]

A. questions
B. affairs
C. business
D. problems

(15)

[  ]

A. egg
B. bless
C. meat
D. cell

(16)

[  ]

A. Before
B. After
C. While
D. And

(17)

[  ]

A. grow
B. die
C. change
D. grow up

(18)

[  ]

A. And
B. But
C. However
D. Yet

(19)

[  ]

A. yet
B. still
C. not
D. no

(20)

[  ]

A. different
B. usual
C. ordinary
D. same

查看答案和解析>>

任务型阅读。
     A rich man was once riding along the road and saw an old man digging in his garden. On the ground lay
a young tree, ready to be planted. The rich man called out to the old man, "What kind of tree are you planting
there, my good man?"   
     "This is a fig (无花果) tree, sir." he said.   
     "A fig tree?" the rich man was very surprised. "Why, how old are you, may I ask?"   
     "I am ninety years old."   
     "What!" cried the rich man. "You're ninety years old. You are planting a very young tree now and it'll take
years to give fruit. You certainly don't hope to live long enough to get any fruit from this tree." The old man
looked around the garden. Then he said with a smile, "Tell me, sir. Did you eat figs when you were a boy?"
"Sure." the rich man did not know why he asked this question. "Then tell me this," he said, "Who planted the
fig trees?" "Why? I don't know." "You see, sir," went on the old man, "Our ancestors planted trees for us to
enjoy and I am doing the same for the people after me."   
     The rich man was quiet and said, "You are right, my good man. We should do some good things for the
people after us. Thank you very much." Then he rode away.
Title: The Story of A Fig (1)_______
The rich man He felt (2)_______ when he saw the old man (3)_______ a fig tree.
He at last found the old man did a good (4)_______ for the people after him.
The old man He was 90 years in (5)_______.
It would be a rather (6)_______ time before he got any fruit from the fig tree.
He thought it (7)_______ to do good things for the people after him.
The rich man came to (8)_______ what the old man meant, and (9)_______ of them thought they should do
good deeds for the people after (10)_______.

查看答案和解析>>

  This is a part from US President Barack Obama’s speech on May 14 at Bamard College in New York.

  … My last piece of advice – this is simple, but perhaps most important: 36 . Nothing worthwhile is easy. No one of achievement has avoided failure – sometimes catastrophic failures. But they keep at it. They learn from mistakes. They don’t 37 .

  When I first arrived on this 38 , I was with little money, fewer options. But it was here that I tried to find my place in this world. I knew I wanted to make a difference, but it was 39 how in fact I’d go about it. But I wanted to do my part to 40 a better world.

  So even as I worked after graduation in a few 41 jobs here in New York, even as I went from motley (鱼龙混杂的)apartment to motley apartment, I 42 .

  … And I wish I could say that this perseverance came from some innate (天生的)toughness in me. But the truth is, it was 43 . I got it from 44 the people who raised me. I grew up as the son of a single mom who struggled to put herself through 45 and make ends meet. She had a marriage that fell apart; 46 went on food stamps at one point to help us 47 . But she didn’t quit. And she earned her degree, and made sure that 48 scholarships and hard work, my sister and I earned 49 .

And 50 , I met a woman who was assigned to advise me on my first summer job at a law firm. And she gave me such good advice that I married her. And Michelle and I gave everything we had to balance our careers and a 51 family. We made that marriage work.

… So 52 it’s starting a business, or running for office, or 53 an amazing family, remember that making your 54 on the world is hard. It takes patience. It takes commitment. It comes with plenty of 55 and it comes with plenty of failures.

36. A. compete B. persevere C. struggle D. preservation

37. A. rest          B. decline           C. quit             D. regret

38. A. campus       B. downtown     C. farm            D. country  

39. A. confident      B. uncertain         C. ambitious         D. proud

40. A. shape         B. instruct           C. organize          D. lead

41. A. amazing       B. disturbing         C. meaningful    D. unsatisfactory

42. A. reached out B. put out           C. gave out          D. made out

43. A. presented B. structured C. learned D. created

44. A. copying B. detecting C. persuading     D. watching 

45. A. life              B. work                C. school        D. business

46. A. yet B. even C. still D. also

47. A. get by B. come by C. get along         D. come along

48. A. during         B. through              C. across        D. over 

49. A. mine B. us C. ours D. hers

50. A. for the time being B. long before        C. up to now        D. later on

51. A. young B. poor C. weak            D. strong

52. A. as if B. if C. whether          D. unless       

53. A. rising             B. raising           C. arousing          D. arising

54. A. view B. stay C. remark           D. mark

55. A. goals B. advantages C. shortcomings      D. setbacks

查看答案和解析>>

 

This is a story that can teach us a good lesson. One day, a man in rags begged from door to door along the street. With an old wallet in his hand, he was asking for a few coins to buy something to eat. He kept complaining about his bad fortune and kept  36 why those who had so much money were never  37 and were always desiring more.

“As far as I’m concerned, if I had only enough to  38 and to wear, I would not want anything more."

Just at that moment Goddess Fortune, who came down the  39 saw the beggar and said to him, “Hi, I have wished to  40 you for a long time. Now, open your  41 and I will pour my gold into it. But I will do that only on this  42 : All that falls into the wallet will be pure gold; but every piece falling upon the  43 shall become dust. Do you understand?”

“I see.” said the beggar.

“Then you should  44 !It’s obvious that your wallet is a/an  45 one, so don’t load it too heavily,” said the Goddess Fortune.

The excited beggar could hardly  46 to have gold. He quickly opened his wallet, and a  47 of yellow coins was poured into it. The wallet grew heavier and heavier.

“Is that enough? Isn’t it cracking?” asked Fortune.

“Never  48 .It’s still strong enough now” answered the beggar.

The wallet was filled with so many coins that the beggar’s hands began to  49 . “Ah, if only the golden stream would  50 forever! Just a little more,” said the beggar, “ 51 just a handful or two.”

“There! It’s full. The wallet will  52 .” warned the Goddess, but the beggar requested, “ It will 53 a little more, just a little more.”
  One more piece was added and the wallet split. The  54 fell upon the ground and became dust. The greedy beggar had now  55 but his broken bag.

36. A. showing       B. explaining         C. proving         D. wondering

37. A. relaxed        B. satisfied          C. worried         D. depressed

38. A. learn          B. watch            C. eat             D. play

39. A. street         B. bridge            C. yard            D. forest

40. A. praise         B. forgive           C. help            D. comfort

41. A. coat          B. pocket           C. box            D. wallet

42. A. occasion       B. suggestion         C. situation         D. condition

43. A. hand          B. feet             C. ground          D. street

44. A. look out        B. look after         C. look up         D. look down

45. A. small          B. empty            C. worn           D. full

46. A. stand          B. wait             C. breathe          D. think

47. A. stream         B. piece            C. pair            D. variety

48. A. stop          B. request           C. fear            D. insist

49. A. spread         B. close            C. loose           D. shake

50. A. pour          B. end              C. dry            D. melt

51. A. take          B. add              C. lend            D. send

52. A. flow          B. burst            C. disappear        D. change

53. A. attract         B. permit            C. include          D. hold

54. A. present        B. food             C. treasure         D. metal

55. A. nothing        B. anything          C. everything       D. something

查看答案和解析>>

阅读理解

  Construction workers in Southern California have made a wild discovery.They were digging at a building site in San Timoteo Canyon(峡谷)when they unearthed hundreds of ancient animal fossils.Researchers say the bones hold important clues about the history of the region.

  Nearly 1, 500 fossils were recovered from the dusty canyon.The remains are about 1.4 million years old.They include the bones of a new species of deer, several small rodents(啮齿目动物)and more.A giant cat fossil was also found.Scientists believe the animal was an ancestor of the saber- toothed tiger.Signs of plant life were uncovered as well.

  “This is a huge find,” says Rick Greenwood, a scientist studying the site.“I don’t think most people had any idea that those types of animals were wandering around here more than a million years ago.”

  San Timoteo Canyon is located about 85 miles from Los Angeles.The area of the canyon where the fossils were found was once part of a green river valley.Today, the region is dry and plant life is rare.

  Most of the fossils are well preserved.Experts say a muddy lake bed may have trapped thirty animals that wandered over for a drink.The mud helped to protect the animal fossils.

  The remains are a million years older than those discovered at the famous La Brea Tar Pits in Los Angeles.Scientists studying the bones will be able to learn more about how the animals adapted to changes in the environment.

  “We have a confused view of what this time period was like, ” says another scientist.“A discovery like this could really be an important contribution.”

  About 35 different animal species are represented in the fossil collection.Scientists began removing bones from the site last fall.The project was completed this summer.Starting next year, the fossils will be on display at the Western Science Center in the nearby city of Hemet, California.

(1)

What does the passage mainly focus on?

[  ]

A.

The secret of ancient animals’ deaths.

B.

The preparation for a future fossil exhibition.

C.

A great discovery of fossils.

D.

The history of San Timoteo Canyon.

(2)

From what Rick says, we know _________.(原创)

[  ]

A.

fossils were discovered in the canyon for the first time.

B.

the canyon in ancient times was quite different.

C.

more research work will be carried on in the canyon.

D.

the river water helped to protect the animal fossils.

(3)

Compared to the discovery at the La Brea Tar Pits, the canyon-involved fossils _________.

[  ]

A.

are far older

B.

include more species

C.

are better preserved

D.

make experts more confused

(4)

What do we know about the fossils from the passage?

[  ]

A.

All of them are of new species.

B.

Some of them have been destroyed

C.

They were looked for under experts’ guidance.

D.

They will be on show in the near future.

查看答案和解析>>


同步练习册答案