填空题 He began looking for the dictionary at 3 o'clock, and until 6, he still didn't find it.
He ______ for the dictionary for three hour, but didn't find it.

  • 1、
【正确答案】 1、had looked    
【答案解析】[名师解析] 英语中，当两个动作发生时，发生在前的动作往往用过去完成时，寻找字典发生在前，因此填had looked。