When somewhat better academically, he returned home to continue his research.
A. equipped
B. had equipped
C. provided
D. providing
网友回答
(答案→)A. equipped
B. had equipped
C. provided
D. providing
解析：考查非谓语动词。句意：当他在学术上被装备的好一些的时候，他回到祖国继续他的研究。他与装备之间是被动关系，故用过去分词equipped，provided提供，这在不合题意，所以选A。