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

练习册系列答案
相关题目
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