题目

My father stayed in Japan only a few months，_____he went through a series of hardship．   A．during which time    B．in time of which    C．where           D whenever 答案：A 解析: 略一只啄木鸟每天能吃645只害虫，一只青蛙8天才能吃608只害虫。啄木鸟比青蛙每天多吃多少只害虫？