问题补充:
Dongying a lot in the last 3 years .It’s now one of the important cities in Shandong.
A. changed
B. changes
C. has changed
D. had changed
答案:
A. changed
B. changes
(答案→)C. has changed
D. had changed
解析:句意:东营在过去的三年中改变了许多,现在他是山东最重要的城市之一。in the last 3 years用于现在完成时,现在完成时的结构have/has+v.(过去分词),故选C。