题目内容
The highest award was given to Anna, who so hard on the project for years, and at last her efforts paid off.
A.has worked B.worked C.was working D.had been working
D
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题目内容
The highest award was given to Anna, who so hard on the project for years, and at last her efforts paid off.
A.has worked B.worked C.was working D.had been working
D