--thank you for keeping me of everything that’s happening.
--Don’t mention it.
A. inform
B. informing
C. informed
D. being informed
网友回答
A. inform
B. informing
(答案→)C. informed
D. being informed
解析：考查固定搭配。Inform sb of sth/to do sth通知某人某事/做某事；keep sb informed of sth使某人知晓......。informed是过去分词化了的形容词，意为“知晓的”。故选C。