that he was in great danger, Eric walked deeper into the forest.
A. Not realized
B. Not to realize
C. Not realizing
D. Not to have realized
网友回答
A. Not realized
B. Not to realize
(答案→)C. Not realizing
D. Not to have realized
解析：考查分词做状语，分词做状语相当于一个原因状语从句，句子意思“因为没有意识到他处于危险之中，埃里克向森林深处走去”，所以选C