．The highest award was given to Anna, who _____ so hard on t


．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
id0077 1年前 已收到1个回答 举报
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dreamshy 幼苗

共回答了25个问题采纳率：100% 举报

D

考查时态，句意;最高奖项被授予安娜，她从事这个项目多年，至少努力没白费，关键的句子：her efforts paid off.用过去时，而一直努力是发生在pay off，之前，用过去完成进行时。选D。

1年前

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