Over the past decades China significantly under the correct leadership of the CPC he sa

问题补充：

Over the past decades, China significantly under the correct leadership of the CPC, he said. The CPCs 18th National Congress will exert great influences on Chinas future and Africa highly expects of Chinas further growth.

A. changed

B. is changing

C. had changed

D. has changed

答案：

A. changed

B. is changing

C. had changed

(答案→)D. has changed

解析：考查时态。本题的关键词是over the past decades在过去的几十年中，该短语与现在完成时连用。故D正确。

考点;考查时态