问题补充：
There are still many problem ahead of us, but by this time next year we can see light at the end of the .
A. battle
B. day
C. road
D. tunnel
答案：
A. battle
B. day
C. road
(答案→)D. tunnel
解析：考查名词：A. battle战役，B. day日子，C. road公路，D. tunnel隧道，我们前面仍然有许多问题,但明年的这个时候我们可以看到隧道尽头的光明。因为提到light，应该是隧道，选D。
