--Has Peter handed in his paper yet?---I’m not sure. He on it last week.A. was workingB.

发布时间：2020-08-15 02:21:36

--Has Peter handed in his paper yet?
---I’m not sure. He      on it last week.
A. was working
B. has worked
C. worked
D. had worked

网友回答

(答案→)A. was working
B. has worked
C. worked
D. had worked
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