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    精英家教网 > 高中英语 > 题目详情

    In manufacturing, cheaper materials are constantly ______ the better, expensive kind．

    [　　]

    A．being substituted for 

    B．instead of

    C．being taken the place of 

    D．standing for

    答案：A
    提示：

    Substitute A for B，指用A去替换B。


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