题目内容
(2014•扬州市)---Has your friend completed his design?
---Not yet. He ________ on it last night.
A. worked B. has worked C. is working D. was working
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题目内容
(2014•扬州市)---Has your friend completed his design?
---Not yet. He ________ on it last night.
A. worked B. has worked C. is working D. was working