2021銀行校園招聘考試：英語單選題（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
東吳教育參考答案解析
答案：D
解析：考查時態和語態，首先考慮語態，主語experiment與謂語conduct構成動賓關系，謂語使用被動形式。題干中出現the second war是過去的時間點，before the second war是過去的過去，因此使用過去完成時。
