问题补充:
单选题WhenIworkedasthegeneralmanagerofthefirm,Isometimeshad_____tovisitLondononbusiness.A.opportunityB.possibilityC.occasionD.chance
答案:
C解析occasion 作可数名词时,意为“时机”,作不可数名词时,意为“必要”,本题中occasion意为“必要”。从句语法结构上看,本句中用opportunity(难得的)机会,chance(偶然的)机会均可,但按逻辑意思,应用occasion.