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    S of bees are flying near the bee-hives. 【查看更多】

     

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     The cell phone is __________ useful invention of the last 50 years, however, some scientists __________ the disappearance of bees.

    A. a; blame it for                                    B. an; blame it for

    C. a; are blamed it for                                D. an; are blamed it for

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    The necklace that she lost is very expensive. It's of great _______.

    A. valuable　　　　　　　　　　B. value

    C. valueless　　　　　　　　 D. unvaluable

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    This book shows the author's ________of learning.

    [    ]

    A. deep   B. deeply   C. depth   D. depths

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    The necklace that she lost is very expensive. It's of great _____.
    [     ]
    A. valuable
    B. value
    C. valueless
    D. invaluable

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     Thank you very much. It's ____ of you.
      A. kindest         B. a most kind         C. the most kind         D. most kind

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