问题补充:
---I have got a headache.
----No wonder .You in front of that computer too long .
A. work
B. are working
C. have been working
D. worked
答案:
A. work
B. are working
(答案→)C. have been working
D. worked
解析:考察时态。句意:我头疼。——不足为奇。你在电脑前工作的太久了。可知叙述的是已经完成的一直在进行的动作,故用完成进行时,选C。