There are still many problems ahead of us, but by this time next year we can see light at the end of the______.
【正确答案】 D
【答案解析】解析:虽然四个选项都可以搭配词组at the end of,但light at the end of the tunnel是英语中的俗语,表示“曙光在前,胜利在望”的意思。其他选项都不能表达这个特定含义,所以选项D正确。