◎ 题干
The policeman's attention was suddenly caught by a small box which ______  placed under
the Minister's car.
A. has been
B. was being
C. had been
D. would be
◎ 答案
查看答案
◎ 解析
查看解析
◎ 知识点
    根据魔方格专家分析,试题“The policeman's attention was suddenly caught by a small box which ______ placed under the Minister's car. A. has been B. was being C. had been D. would b…”主要考查了你对  【过去完成时的被动语态】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。