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    Computers have _____ many changes in the workplace.

    A. heard about
    B. known about
    C. brought about
    D. cared about
    C
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    科目：高中英语 来源：0127 模拟题 题型：单选题

    Computers have _____ many changes in the workplace.
    [     ]
    A. heard about
    B. known about
    C. brought about
    D. cared about

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