As high school students, it’s very important to keep ourselves of what’s happening home and abroad every day.
A. to inform
B. informing
C. informed
D. be informed
网友回答
A. to inform
B. informing
(答案→)C. informed
D. be informed
解析：考查过去分词做宾语补足语：句意：做为高中学生，及时了解国内外发生的事情很重要。Keep后面可以接宾语+宾语补足语，ourselves和inform是被动关系，用过去分词做宾语补足语，选C。