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
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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