The policeman's attention was suddenly caught by a small box which ____placed under the（略）
问题描述：
The policeman's attention was suddenly caught by a small box which ____placed under the（略）
The policeman's attention was suddenly caught by a small box which ____placed under the Minuster's car.为什么选C?A has been B was being C had been D would be感觉选C 有道理 但是选B也应该对啊
答
选C,是过去完成时,意思是“这个盒子之前已经被放在车子下面了”
选B,是过去进行时,意思是“这个盒子当时正在被放在车子下面”
如果分析语境,警察来的时候应该勘察的现场,没有任何动作发生,因此选C更有道理.