单选题：To improve efficiency the factory__________most of its worke

题目内容：

To improve efficiency the factory__________most of its workers with robots． A．Operated
B．Replaced
C．contributed
D．accomplished

参考答案：

答案解析：

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Helen was much kinder to her youngest child than she was to the others，——，0f cou

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By the end of this month，we surelya satisf__________actory solution to the probl

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