Dongying a lot in the last 3 years .It’s now one of the important cities in Shandong.A. c

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。