问题
选择题
The policeman’s attention was suddenly caught by a small box which _____ placed under the Minister’s car.
A．has been
B．had been
C．was being
D．would be
答案
答案：B
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The policeman’s attention was suddenly caught by a small box which _____ placed under the Minister’s car.
A．has been
B．had been
C．was being
D．would be
答案：B