_______ those past years, we couldn’t help feeling sorry for our parents who never had a rest all the year round.
A.Looking back upon
B.Looking around
C.Looking out
D.Looking up
网友回答
A解析 词义辨析。Looking back upon回顾；Looking around 向四周看；Looking out向外看；Looking up 抬头看。句意：回顾过去的这些年，我们对常年不休息的的父母感到抱歉。所以选A。