练习册

  • 练习册
  • 试题
    相关习题
     0  5013  5021  5027  5031  5037  5039  5043  5049  5051  5057  5063  5067  5069  5073  5079  5081  5087  5091  5093  5097  5099  5103  5105  5107  5108  5109  5111  5112  5113  5115  5117  5121  5123  5127  5129  5133  5139  5141  5147  5151  5153  5157  5163  5169  5171  5177  5181  5183  5189  5193  5199  5207  151629 

    科目： 来源： 题型：单选题

    The coldis the most common of man’s ailments(疾病). Yet it stumped(难住)the medical authorities. Many of more terrible diseases have comeunder the control of modem man as the result of the knowledge gained in the labof science research. Investigators have thought that the cold is usually causedby a virus(病毒). However, no method of studying this virus has been devised(提出). The chimpanzee(黑猩猩)is the only animal towhich the disease can be given experimentally. The use of this animal islimited by its cost and by the fact that so many of the animals die ofpneumonia during the experiments. This leaves for all practical purposes onlyhuman volunteers to be used in research projects. Many people of prisons havehelped in this work, but because of .these limitations, research into the causeand cure of colds has progressed very slowly.Research into the cause and cure of colds has________.


    1. A.
      gone ahead very slowly
    2. B.
      gone ahead very quickly
    3. C.
      been very common
    4. D.
      been impossible

    查看答案和解析>>

    科目： 来源： 题型：单选题

    There are many old trees in our school, each ________ about 100 years ago．


    1. A.
      dates from
    2. B.
      dates back
    3. C.
      dating from
    4. D.
      dating back

    查看答案和解析>>

    科目： 来源： 题型：单选题

    It's not what we do once in a while ______ shapes our lives, but what we do consistently
    　　


    1. A.
      which
    2. B.
      that
    3. C.
      how
    4. D.
      when

    查看答案和解析>>

    科目： 来源： 题型：单选题

    It is most instructive lecture that I _______ since I came to this school.


    1. A.
      attended
    2. B.
      had attended
    3. C.
      am attending
    4. D.
      have attended

    查看答案和解析>>

    科目： 来源： 题型：单选题

    Oh, it’s you．I ________ know you ________ here．


    1. A.
      don’t;are
    2. B.
      didn’t;are
    3. C.
      didn’t;were
    4. D.
      don’t;will be

    查看答案和解析>>

    科目： 来源： 题型：单选题

    He is considering ________ abroad for further study．


    1. A.
      going
    2. B.
      of going
    3. C.
      to go
    4. D.
      go

    查看答案和解析>>

    科目： 来源： 题型：单选题

    You will be accepted for the course ________ it isn’t full, in which case we will inform you．


    1. A.
      when
    2. B.
      unless
    3. C.
      while
    4. D.
      but

    查看答案和解析>>

    科目： 来源： 题型：单选题

    There is no ________ what he is going to do.


    1. A.
      tell
    2. B.
      telling
    3. C.
      told
    4. D.
      to tell

    查看答案和解析>>

    科目： 来源： 题型：单选题

    When he realized the police had spotted him，the man      the exit as quickly as possible．


    1. A.
      made　off
    2. B.
      made　for
    3. C.
      made　out
    4. D.
      made　up

    查看答案和解析>>

    科目： 来源： 题型：单选题

    ________ go abroad to have a further education, he works hard at English day and night．


    1. A.
      Itch to
    2. B.
      Itching to
    3. C.
      Having an itch for
    4. D.
      Itch

    查看答案和解析>>

    同步练习册答案