Experience of this kind in both the U.S. and Europe well before the Second World War.A.have conducte

题目简介

Experience of this kind in both the U.S. and Europe well before the Second World War.A.have conducte

题目详情

Experience of this kind        in both the U.S. and Europe well before the Second World War.
A.have conductedB.have been conducted
C.had conductedD.had been conducted
题型:单选题难度:中档来源:不详

答案

D

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