单选题It takes at least five to ten years______it is possible to test this medicine on human patients.A beforeB sinceC afterD when

题目
单选题
It takes at least five to ten years______it is possible to test this medicine on human patients.
A

before

B

since

C

after

D

when

相似考题

1.28． How old is John's brother now when John is fifteen in the story?A．Ten years old．B． Fifteen years oldC． Twenty years oldD． Twenty-five years old．

2.I hope all the precautions against air pollution, _______ suggested by the local government, will be seriously considered here. A) while B) since C) after D) as

3.The fire was finally brought under control, ___________ extensive damage had been caused.A) before B) since C) after D) as

4.How many minutes early is a job applicant often expected to arrive for the interview?A.Over ten.B.No more than ten.C.At most five.D.No less than five.

更多“单选题It takes at least five to ten years______it is possible to test this medicine on human patients.A beforeB sinceC afterD when”相关问题

  • 第1题：

    My father took the photos ______ we lived in Cambridge.

    A: though

    B: since

    C: until

    D: when


    参考答案：D

  • 第2题：

    It was ten years ago ____ we first went to school together.

    A.when

    B.since

    C.while

    D.that


    答案：D

    解析：这题考查强调句的用法：句型是：It is/was+强调部分+that，,句意是我们第一次一起上学是在十年前

  • 第3题：

    It won t be long () they are falling out over that money their mother left them, or I m Dutchman.

    A、soon

    B、since

    C、after

    D、before


    参考答案：D

  • 第4题：

    what chemicals did you use to treat the boiler water ?when you test alkalinity and acidity of water in boiler by pH test paper ? the result shows the boiler water is in acidiity . please describe what the possible cause is .


    正确答案：I have ever used the following brand chemicals :unitor , drew and so on . We should keep the boiler water’s ph scale between 10.5 and 11.5 . If the water become of acidity ( ph scale is below 10 ) ,it is may be caused by following reasons : The water has not been given enough blow down ,or has not been filled enough alkalinity chemicals

  • 第5题：

    The use of wrong medicine may present a hazard to the patients.

    A:protection
    B:indication
    C:immunity
    D:danger

    答案：D
    解析：
    本题考查的是对名词的认知。这句话的意思是：误用药物可能对病人造成危险。hazard的意思是危险，例如：He had put his own life in hazard．他是在拿自己的生命来冒险。选项A protection保护；选项B indication指示；选项C immunity免疫力；选项D danger 危险。hazard和danger意思最接近，所以选D。

  • 第6题：

    Jim takes the medicine（）the doctor says.

    Aas

    Blike

    Cwhat

    Dbecause


    A
    略

  • 第7题：

    On the table there are（）

    • A、five ten-dollar bills
    • B、five ten-dollars bill
    • C、five ten dollars bills

    正确答案:A

  • 第8题：

    My parents are not interested in modern music. They are（）the times.

    • A、before
    • B、behind
    • C、after
    • D、low

    正确答案:B

  • 第9题：

    单选题
    Jim takes the medicine（）the doctor says.
    A

    as

    B

    like

    C

    what

    D

    because


    正确答案： A
    解析： 暂无解析

  • 第10题：

    单选题
    How much should you at least pay if your family (five persons, including an elderly person, two adults and the ten-year-old twins) visit the park? ______
    A

    ￡24.50.

    B

    ￡25.50.

    C

    ￡26.50.

    D

    ￡27.50.


    正确答案： D
    解析：
    逻辑计算题。本题需要简单计算。题目中问的是最少付多少钱。根据表格内容可知，他们可以买家庭票(两个大人+两个小孩)，20英镑，然后再买一张老年人票5.5英镑，因此他们最少只需付25.5英镑，故选B项。

  • 第11题：

    单选题
    右舵10。 （）
    A

    Port ten.

    B

    Port slow.

    C

    Port five.

    D

    Starboard ten.


    正确答案： C
    解析： 暂无解析

  • 第12题：

    单选题
    It takes at least five to ten years______it is possible to test this medicine on human patients.
    A

    before

    B

    since

    C

    after

    D

    when


    正确答案： A
    解析：

  • 第13题：

    It was four days ago____ the man was put into prison again.

    A. that

    B. since

    C. after

    D. before


    正确答案：A

  • 第14题：

    It won't be long __________ this theory will be proved

    to be wrong.

    A、soon

    B、since

    C、after

    D、before


    正确答案:D

  • 第15题：

    When a fire( )at the National Exhibition, at least ten priceless paintings were completely destroyed.

    A. broke off

    B. broke out

    C. broke down

    D. broke up


    正确答案:B

  • 第16题：

    36．

    A．before

    B．until

    C．after

    D．when


    正确答案：B
    36．B【解析】由题意“然后他倒了一杯水直到罐子满了”知选B。

  • 第17题：

    The earth moves around the sun.

    A:before
    B:round
    C:after
    D:over

    答案：B
    解析：

  • 第18题：

    Jim takes the medicine（）the doctor says.

    • A、as
    • B、like
    • C、what
    • D、because

    正确答案:A

  • 第19题：

    The buyer should open the ______L/C 30 days _____the time of shipment.

    • A、relative．before 
    • B、relevant．on
    • C、covering, after 
    • D、above, for

    正确答案:A

  • 第20题：

    （）operation, any obstacles in the way of hatches must be removed and cleaned.

    • A、Before
    • B、During
    • C、After
    • D、Within

    正确答案:A

  • 第21题：

    单选题
    When a fire _____ at the National Exhibition in London, at least ten priceless paintings completely destroyed.
    A

    broke off

    B

    broke down

    C

    broke out

    D

    broke up


    正确答案： C
    解析：
    句意：当伦敦国家展览馆爆发火灾时，至少有10件无价的绘画作品完全被毁。break out突然发生，爆发。break off中断，终止。break down出故障。break up驱散。

  • 第22题：

    单选题
    Ten minutes ______ too short a time to finish this test.
    A

    is

    B

    are

    C

    has

    D

    have


    正确答案： C
    解析：
    时间、距离等被认为是一个整体的词汇作主语，谓语用单数。

  • 第23题：

    单选题
    When you are reading a novel, you should check your understanding of the content after ______.
    A

    every chapter

    B

    every section

    C

    every four or five pages

    D

    every ten or twelve pages


    正确答案： D
    解析：
    答案在文章第二段第二句“…stop after every chapter(if you are reading a novel)”中。故选A。

  • 第24题：

    单选题
    Scientists say it may be five or six years _____ this medicine is tested on human beings.
    A

    since

    B

    before

    C

    after

    D

    when


    正确答案： A
    解析：

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