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：考察非谓语动词用法。Realize与Eric构成主动关系，故使用现在分词表示主动，根据句意可知使用否定形式，故C正确。句意：没有意识到自己处于巨大的危险中，Eric继续向树林深处走去。