-Life itself tells us it is necessary to learn to be .One can hardly survive without help from other people in the world.
A. sensitive
B. petitive
C. grateful
D. careful
网友回答
A. sensitive
B. petitive
(答案→)C. grateful
D. careful
解析：考查形容词辨析。A敏感的；B有竞争性的；C感激的；D细心的；句意：生活告诉我们要学会感激是很必要的。因为如果没有别人的帮助在这个世界上是很难活下来的。根据句意说明C正确。