【题目】When I the past and think how much time has been wasted, my heart bleeds.
A. look back on B. look forward to
C. look out of D. look away from
在线课程【答案】A
【解析】考查动词短语辨析。句意：当我回顾过去，想想浪费了多少时间，我的心在滴血。look back on回忆；look forward to期盼；look out of 看；look away from远离。根据题意，故选A。