—I have a headache.
—I’m not surprised you in front of the puter for too long.
A. work
B. are working
C. have been working
D. had worked
网友回答
A. work
B. are working
(答案→)C. have been working
D. had worked
解析：句意：--我头疼。--我一点都不奇怪，你在电脑前面太长时间了。因为和for too long连用，用现在完成进行时，表示动作从过去到现在一直在做，对现在造成影响，而且可能还要继续下去，选C。