Overtheyears,whilefocusingonitsowndevelopment,China

问题详情：

 Over the years, while focusing on its own development, China _____ aid to the best of its ability to other developing countries with various difficulties.

   A. provides                  B. is providing           C. has been providing   D. will provide

【回答】

C

知识点：动词时态与语态

题型：选择题