【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

【答案】A
【解析】考查动词短语辨析。句意：当我回顾过去，想到浪费了多少时间，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。