单选题
Some studies confirmed that this kind of eye disease was ______ in tropical countries.
[A] prospective [B] prevalent [C] provocative [D] perpetual
【正确答案】
B
【答案解析】prevalent普遍的,流行的;prospective未来的;盼望中的;provocative使人生气的;煽动的;挑衅的; perpetual永久的。句意:一些研究证实这种眼病在热带国家很普遍。