问题
选择题
| — I have got a headache. — No wonder. You ______ in front of that computer too long. |
| A. work B. are working C. worked D. have been working |
答案
答案：D
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| — I have got a headache. — No wonder. You ______ in front of that computer too long. |
| A. work B. are working C. worked D. have been working |
答案：D