搜题，就来5TiKU.com题库【问题】 You look so tired. You _____ all night.Amust have been workingBmight be workingCmust workDshould have worked
You look so tired. You _____ all night.Amust have been workingBmight be workingCmust workDshould have worked
正确答案：A
题目解析：本题出自河海大学，江苏开放大学大学英语（A）1，由丰阳塔题库搜集整理。
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