[A] occur [B] engage [C] confront[D] encounter

[A]occur

[B]engage

[C]confront

[D]encounter

正确答案：D
31.D 
由第三段的最后一句话：Ifstr essfulsituationsarecontinuallyencountered,…可以找到此题答案。Peopleofallagesencounterstr ess.各个年龄段的人都会遇到压力。[D]encounter遭遇，遇到，强调“偶然遇见”；[A]occurvi.发生，出现；[B]engagevt.使忙碌，雇佣，预定，使从事于；例：beengagedin…忙于(从事)……。[C]confront①面对；面临；遭遇。例：toconfrontd anger(勇敢地)面对危险②(与with连用)使面对；使面临。例：be confrontedwithcrisis面临危机。