Overtheyears,whilefocusingonitsowndevelopment,China

問題詳情：

 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

知識點：動詞時態與語態

題型：選擇題