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    科目： 来源： 题型：单选题

    The fire ________ in the supermarket during the busy time and claimed 100 lives.


    1. A.
      broke off
    2. B.
      broke out
    3. C.
      broke away
    4. D.
      broke in

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    科目： 来源： 题型：单选题

    The construction of Shanghai Subway No. 2 ________ the convenience of the traffic in the city.


    1. A.
      adds up to
    2. B.
      adds to
    3. C.
      adds
    4. D.
      is added to

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    科目： 来源： 题型：单选题

    This is the photo of the building which _______. How wonderful it is!


    1. A.
      is being built
    2. B.
      has been built
    3. C.
      will be built
    4. D.
      would be built

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    科目： 来源： 题型：单选题

    Nelson Mandela spent his time _______ in prison thinking about how to continue his fight for the black people’s freedom.


    1. A.
      locking
    2. B.
      to lock
    3. C.
      being locked
    4. D.
      locked

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    科目： 来源： 题型：单选题

    We hope you ________ with the gift we sent you last night.


    1. A.
      are satisfied
    2. B.
      are to satisfy
    3. C.
      will satisfy
    4. D.
      would satisfy

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    科目： 来源： 题型：单选题

    The headmaster will have the opening speech __________ by a student．


    1. A.
      deliver
    2. B.
      delivered
    3. C.
      delivering
    4. D.
      to deliver

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    科目： 来源： 题型：单选题

    New technology as well as new machines __________ been introduced in this company．


    1. A.
      have
    2. B.
      has
    3. C.
      is having
    4. D.
      having

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    科目： 来源： 题型：单选题

    This will enable the store to sell more, __________ greater success．


    1. A.
      achieve
    2. B.
      gain
    3. C.
      achieving
    4. D.
      succeeding

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    科目： 来源： 题型：单选题

    在实验室中，如将有毒食物喂给大鼠，使大鼠有几个小时的不适后，大鼠从此不再吃这种有毒食物了。这一现象属于动物的


    1. A.
      本能
    2. B.
      非条件反射
    3. C.
      条件反射
    4. D.
      印随

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    科目： 来源： 题型：单选题

    用15N标记含有200个碱基的DNA分子，其中有胞嘧啶60个，该DNA分子在14N的培养基中连续复制4次。下列有关判断不正确的是


    1. A.
      含有15N的DNA分子占1/8
    2. B.
      复制过程中需腺嘌呤脱氧核苷酸600个
    3. C.
      含有14N的DNA分子占7/8
    4. D.
      复制结果共产生16个DNA分子

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