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. was being
C. had been
D. would be
答案
答案：C
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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. was being
C. had been
D. would be
答案：C