--- Thank you for keeping me of everything that’s happening.
--- Don’t mention it .
A. inform
B. informed
C. informing
D. to inform
网友回答
A. inform
(答案→)B. informed
C. informing
D. to inform
解析：考查过去分词做宾语补足语：me和inform是被动关系，用过去分词做宾语补足语，keep sb informed of sth及时告知某人某事，句意：--谢谢你告诉我发生的事情。--不用谢。选B。