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    科目： 来源：北京模拟题 题型：单选题

    In the rainforest of the Amazon, 50 to 150 plant species ______ every day.
    [     ]
    A. are being destroyed        
    B. are destroying
    C. have been destroyed        
    D. destroyed

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    科目： 来源：河北省模拟题 题型：单选题

    By the time I arrived at the hospital , his wound        .
    [      ]
    A. had treated
    B. was treated
    C. treated
    D. had been treated

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    科目： 来源：河北省月考题 题型：改错题

    单句改错。  
         增加：“在 …后加…”， 如， 在and 后 加 what
         删除： 写上多余的词，并用斜线划掉, 如，  of 修改： …改为…  ， 如，and 改为 but 
         注意：格式错误不给分。
    1. The book will have published by the end of next month.
    2. The singer was accompanied with the piano by her sister.
    3. The staff has made it clear to every passenger that they are safe and nothing will spoil their 
        pleasant voyage.
    4. In many people’s opinion, that company, though relatively small, is pleasant to deal.
    5. When we moved to France, the children adapted the change very quickly. 
    6. He decided to cut off cigarettes and alcohol.
    7. Let’s set away our personal feelings.
    8. The judge announced that the young man was innocent.
    9. You can’t take her promises serious; she never keeps her word. 
    10. A temperate climate is benefit to the health.

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    科目： 来源：重庆市模拟题 题型：单选题

    The first edition ____ in 1955 and ____ a best seller ever since.

    [     ]

    A. was published; had been
    B. had been published; had been
    C. has been published; has been
    D. was published; has been

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    科目： 来源：0108 月考题 题型：单选题

    — Why does the lake smell terrible?
    — Because large quantities of water ____.

     [     ]

    A. have polluted
    B. are being polluted
    C. has been polluted
    D. have been polluted

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    科目： 来源：同步题 题型：单选题

    His sister left home in 1998, and _____ since.

    [     ]

    A. had not been heard of
    B. has not been heard of
    C. had not heard of
    D. has not heard of

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    科目： 来源：专项题 题型：单选题

    It has been announced that students shall remain in their seats until all the papers ________.
    [      ]
    A. will be collected  
    B. were collected
    C. have been collected  
    D. have collected

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    科目： 来源：同步题 题型：单选题

    This old custom has________ since the 18th century, and remains practically unchanged.    
    [     ]
    A. handed down    
    B. been handed down    
    C. handed out    
    D. been handed out

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    科目： 来源：北京期中题 题型：单选题

    The old couple ______ for 50 years and never once have they quarreled with each other.
    [     ]
    A. have married
    B. have been married
    C. have got married
    D. had married

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    科目： 来源：同步题 题型：单选题

    Do you know many man-made satellites _____ space by our scientists since the middle of the twentieth century?
    [     ]
    A. have sent into
    B. were carried into
    C. have been sent into
    D. have been brought into

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