中文谷—Youlooktired. —Yes,I
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问题详情：
— You look tired.
— Yes, I ______ non-stop until seven o'clock.
A. had worked B. would be working C. was working D. have been working
【回答】
C
知识点：过去进行时及其被动式
题型：选择题
标签：
Youlooktired YesI
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