题目内容
35.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
解析

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题目内容
35.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
解析