No matter when I look my miserable past, I feel sad and sorrowful.A.backB.onC.ba
来源：网络
时间：
推荐文章
No matter when I look my miserable past, I feel sad and sorrowful.
A.back
B.on
C.back on
D.upon
试题答案
C
这题考查词组：look back on/upon“回顾”，句意是：无论何时我想到让我痛苦的过去，我都会感到悲伤。选C。