四六级考试

【单选题】 In manufacturing, cheaper materials are constantly being ______ for the better and more expensive kind.
A．replaced
B．transformed
C．displaced
D．substituted

网考网参考答案：D
网考网解析：
[试题分析] 词语搭配题。 [详细解答] transform的意思是转变，它的用法是transform A into B，将A转变成B；replace，displace，substitute都有代替的意思，但用法不同，如果说B被A代替，它们分别是B is replaced by A；B is displaced by A；A is substituted for B。 查看试题解析出处>>