Climbing the Great Wall might make you very tired, but it’s a meaningful .
A. lesson
B. experience
C. story
D. sentence
网友回答
A. lesson
(答案→)B. experience
C. story
D. sentence
解析：lesson课程，教训；experience经历，经验；story故事；sentence句子。句意：爬长城可能让你非常累，但是那是一个非常有意义的经历。结合语境可知选B。