2021银行校园招聘考试：英语单选题（18）
Experiments of this kind ______ in both the U.S. and Europe well before the Second World War（ ）
A. have conducted
B. have been conducted
C. had conducted
D. had been conducted
东吴教育参考答案解析
答案：D
解析：考查时态和语态，首先考虑语态，主语experiment与谓语conduct构成动宾关系，谓语使用被动形式。题干中出现the second war是过去的时间点，before the second war是过去的过去，因此使用过去完成时。
