考查名词辨析。句意:过去三十年来,公共教育对特殊儿童表现出极大的兴趣。disappointment意为“失望”;interest意为“兴趣,利益”;surprise意为“惊讶,惊奇”;joy意为“乐趣”。根据下文的“the strong feeling in our society that all citizens, ______ their special conditions, have a right to get the chance to fully develop their ______.”以及介词in可知,此处应为“兴趣”。故选B。