Joe had many regrets when he ___

Joe had many regrets when he ____ the years he spent abroad.
A、looked up to
B、looked down on
C、looked back on
D、looked forward to
【正确答案】：C
【题目解析】：乔回忆在国外的日子时有许多遗憾。人们去教会祈求拜上帝。A 尊敬，敬仰 B看不起；轻视；蔑视 C 回顾 D盼望，期待