Young people are not to stand and look at works of art; they want art they can participate in.
A. content
B. generous
C. confident
D. conservative
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(答案→)A. content
B. generous
C. confident
D. conservative
解析：形容词辨析。A满意的；B慷慨的；C有信心的；D保守的；结合句意可知A正确。句意：年轻人不满足于站在那里观看艺术作品，他们想做一些他们能参加的艺术。