106. The method ______ highly effective.A.was provedB.proved asC.proved to beD.is proved to be-英语

题目简介

106. The method ______ highly effective.A.was provedB.proved asC.proved to beD.is proved to be-英语

题目详情


106. The method ______ highly effective.
A.was provedB.proved as
C.proved to beD.is proved to be
题型:单选题难度:偏易来源:不详

答案

 C

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