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—Hasyourfriendcompletedhisdesign?—Notyet.He

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问题详情:

—Hasyourfriendcompletedhisdesign?—Notyet.He

—Has your friend completed his design?

—Not yet. He _______ on it last night.

  A. worked      B. has worked       C. is working         D. was working

【回答】

D

知识点:动词时态

题型:选择题

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