题目内容

In manufacturing, cheaper materials are constantly being ????? for the better, more expensive kind.

A. maintained????????????? B. cancelled????????????? C. substituted????????????? D. deposited

 

【答案】

C

【解析】

试题分析：A. maintained维持，B. cancelled取消， C. substituted替换，D. deposited储蓄，寄存，放置，安置，句意：在生产中，便宜的材料被不断的替换成更好的，更贵的品种。所以选C。

考点：考查动词辨析

 

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