Question

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

1. A.
   changed
2. B.
   is changing
3. C.
   had changed
4. D.
   has changed

Answer 1

D
试题分析：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
点评：时态的考查要根据句子的关键词和上下文语境。