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