Fiveclonedpigs，whoseorgansarem

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更新 2022-09-03
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Five cloned pigs，whose organs are much less likely to be rejected(排斥) by a patient，have been born in the U．S.
More than 62,000 people in the U．S. alone are waiting to ____ donated hearts，lungs and so on.The number of human donors falls far short of ____.Pig organs are of a(n) ____ size to human organs，and some scientists hope they might be used to help meet the ____.But previous attempts to transplant pig tissue into humans have ____.
The five pigs ____ a gene that adds a sugar to the surface of pig cells.The sugar would ____ immune(免疫的) rejection of the tissue.“This advance provides a neartime ____ for overcoming the problem that there is not enough human organs for transplants，”says an expert.“This is the ____ gene for overcoming the ____ stage of rejection.”
____，scientists warn that much more work is necessary ____ organs from copies of the pigs could be transplanted into humans.Human genes will need to be added，to ____ rejection of the organ in the long term.There are also ____ that pig viruses could infect patients.
Cloning techniques were ____ to the production of the pigs.Genes can only be knocked out(去除) in a single cell.Cloning of these single cells then allowed the ____ of a whole animal in which the gene was knocked out in every cell.But the PPL researchers have ____ in knocking out only one copy of the gene.The team will now attempt to knock out both copies of the gene.
The team will also ____ tests to investigate whether a virus from the pigs could infect human cells.“Although a lot of the work is very ____，we’re still very far off being able to grow an organ，” says Julia，who is working on this project and quite ____ to creating similar knockout pigs with researchers at the University of Missouri.

A．exchange B．check C．possess D．receive

A．discussion B．demand C．doubt D．distance

A．beneficial B．identical C．similar D．certain

A．shortage B．condition C．satisfaction D．argument

A．continued B．failed C．finished D．paused

A．lack B．include C．make D．change

A．leave B．cause C．block D．destroy

A．supply B．ambition C．contribution D．solution

A．only B．rare C．key D．safe

A．last B．whole C．next D．early

A．However B．Therefore C．Besides D．Finally

A．because B．before C．if D．after

A．prevent B．ignore C．judge D．weaken

A．regrets B．emotions C．concerns D．interests

A．simple B．vital C．unusual D．basic

A．collection B．application C．reception D．creation

A．delighted B．succeeded C．joined D．believed

A．conduct B．plan C．design D．study

A．perfect B．strange C．exciting D．disappointing

A．opposed B．used C．devoted D．suited

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32. A.immediately      B. gradually       C. hardly       D.eventually
33. A. hoped          B. advised         C.urged        D.expected
34. A.when           B.until           C.after         D. since
35. A.audience        B.conductor        C.violinist      D.pianist
36. A.left             B. stopped         C.remained     D.arrived
37. A.hands           B. eyes            C.opinion      D.mind
38. A.fast             B.badly           C.well         D.gently
39. A.started          B.performed        C.finished      D.paused
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41. A.thought         B.happiness        C.excitement    D.silence
42. A.asked         B. wondered        C.explained     D.introduced
43. A.broken         B.lost              C.bad          D.difficult
44. A.dream         B. plan              C. suggestion    D. task
45. A.take           B.get               C.make         D.carry
46. A.warned        B.reminded          C. required      D.robbed
47. A.poor          B.brave              C.guilty        D.rich
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16．A．until             B．when            C．after            D．before
17．A．providing           B．catching        C．feeding           D．supplying
18．A．bent over         B．came up        C．turned over     D．broke down
19．A．on the other end     B．on the other hand C．on one hand     D．at the either side
20．A．with anxiety       B．in surprise      C．with admiration D．for fear
21．A．delighted               B．frustrated       C．frightened       D．exhausted
22．A．and              B．but            C．however         D．yet
23．A．bring it home     B．put it aside       C．put it back      D．pick it up
24．A．Even though     B．Now that        C．Ever since      D．In case
25．A．tell              B．say            C．speak           D．talk
26．A．passed            B．changed         C．fixed            D．refused
27．A．the wide container B．the broad sea   C．the black water D．the small river
28．A．fled             B．disappeared      C．floated          D．swam
29．A．wrong             B．right             C．satisfactory     D．pleased
30．A．caught             B．saw           C．cast             D．threw
31．A．a different          B．many big       C．even bigger     D．the same
32．A．which is          B．it is           C．that is          D．this is
33．A．do wrong           B．do right        C．do harm         D．do good
34．A．were taught        B．told           C．were let          D．orderedw
35．A．freshly            B．fresh           C．clearly         D．strongly

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--- Winston Churchill
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25. A. know                 B. believe                     C. respect                 D. understand
26. A. livinging            B. studying               C. staying           D. volunteering
27. A. unless            B. until                  C. after               D. because
28. A. hospital           B. school                C. room              D. building
29. A. plan                   B. style                  C. opinion           D. life
30. A. looked              B. stepped                C. turned             D. appeared
31. A. happy            B. upset                  C. nervous           D. worried
32. A. special           B. curious                C. routine              D. hopeful
33. A. notice            B. expect                 C. watch             D. annoy
34. A. foolish            B. bright                 C. dirty              D. silent
35. A. smiling           B. sleeping               C. learning          D. playing
36. A. loud                B. crazy                  C. eager             D. irritating
37. A. valued            B. tired                   C. disappointed    D. surprised
38. A. expectation       B. dream                  C. influence       D. love
39. A. developed        B. remembered             C. worked          D. improved
40. A. help out            B. drop in                 C. go around      D. turn up
41. A. what              B. which                 C. where             D. that
42. A. With              B. For                    C. Against           D. In spite of
43. A. willing           B. optimistic            C. sad               D. pitiful
44. A. life               B. habit                   C. nature            D. family

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二、完形填空
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31. A. could never imagined   B. imagined
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32. A. which               B. that              C. /               D. who
33. A. thousands of        B. thousand of        C. thousand        D. thousands
34. A. feel                B. feels             C. felt             D. has felt
35. A. heat               B. heated            C. it was heated       D. it has heated
36. A. room              B. house             C. amber             D. thing
37. A. of                 B. to               C. for              D. in
38. A. spent              B. cost              C. took            D. costs
39. A .job               B. work             C. works           D. gift
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A boy walked along Carver Street, singing a sad song. He walked with his head down. Once he looked up and noticed the sign across the empty street, painted on the side of an old house. On the sign a big woman with yellow hair and a five-mile smile held out a big bottle. “Coca-Cola. Drink-Cola-Cola,” the sign said.
　　“Boy!” the silence was cut by a sudden cry. He turned around quickly to see who had called.
　　An old woman was standing at her door.
　　“You boy! Come here this minute!”
　　Slowly the boy   21  onto the cold flat stones leading to the old woman’s house. When he arrived at her house, she   22  out her hand and wrapped（缠住）her   23  old fingers around his arm.
　　“Help me inside, boy,” she said. “Help me   24  to my bed. What’s your name?”
　　“Joseph,” he said.
　　The old woman on the bed tried to   25  up, raising herself on her elbow（肘）. Water   26   from her eyes and mouth. The sight of her made Joseph feel   27  .
　　“I’m dying, Joseph. You can see that, can’t you? I want you to write a   28  for me. There’s paper and pencil on the table there.”
　　Joseph looked down at the   29  , and then looked out of the window. He saw the sign again, “Coca-Cola. Drink Cola-Cola.”
　　“I want my silver ring to   30  to my daughter.”
　　Joseph bent his small body over the table and   31  the pencil slowly across the paper.
　　“There’s my Bible（圣经）,” the old woman said. “That’s for my daughter, too. I want a   32  Christian burial（基督葬礼）with lots of singing. Write that down, too. That’s the last   33  of a poor old woman.”
　　The boy laboured over the paper. Again he looked out of the window.
　　“Here. Bring it here so I can   34  it.”
　　Joseph found the Bible, and,   35  the paper inside, laid it next to the bed.
　　“ 36  me now, boy,” she sighed. “I’m tired.”
　　He ran out of the house.
　　A cold wind blew through the   37  window, but the old woman on the bed   38  nothing. She was dead. The paper in the Bible moved back and forth in the wind.   39  on the paper were some childish letters. They   40  the words, “Coca-Cola. Drink Coca-Cola.”
　　21．A．rushed      B．struggled     C．hurried        D．stepped
　　22．A．reached    B．let               C．pushed           D．pointed
　　23．A．firm              B．smooth          C．dry                D．fresh
　　24．A．back         B．up                    C．away    　      D．ahead
　　25．A．sit          B．get                   C．stand             D．wake
　　26．A．fell         B．burnt             C．burst              D．ran
　　27．A．ill          B．sick             C．unpleasant      D．funny
　　28．A．letter             B．note             C．will              D．message
　　29．A．table              B．pen              C．paper             D．woman
　　30．A．send    　 B．go                C．belong           D．come
　　31．A．moved 　 B．drew              C．used              D．pulled
　　32．A．great      B．merry     　   C．splendid         D．real
　　33．A．hope  　   B．chance           C．opinion          D．wish
　　34．A．sign  　    B．read             C．remember      D．copy
　　35．A．setting     B．hiding            C．placing          D．laying
　　36．A．Hold      B．Leave           C．Excuse           D．Pardon
　　37．A．large       B．open            C．small             D．pretty
　　38．A．did　     B．saw              C．felt              D．knew
　　39．A．Described B．Printed          C．Recorded       D．Written
40．A．formed   B．spelled           C．organized       D．repeated

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