High school students are supposed to be about public services，which will benefit them in the long run．
A. curious
B. anxious
C. particular
D. enthusiastic
网友回答
A. curious
B. anxious
C. particular
(答案→)D. enthusiastic
解析：句意：高中生都应该热心于为大众服务，长远来看这对他们有好处。A. curious好奇；B．anxious焦急的；C particular特别的；D.enthusiastic 热心的。故选D。
考点: 考查形容词的用法。