题目

—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：. C。 解析: 由于在电脑前工作太久，所以导致了现在头痛的结果，故空格处应填现在完成时或现在完成进行时，即答案选C。

查看本题答案和解析