---Do you think I ought to go with them to Hawaii for the holiday?---Why, of course you should. It's a _______ in a lifetime.A.luckB.wayC.chanceD.possibility
网友回答
C解析chance表示“机会”，possibility表示“可能性”，There's a chance/possibility句式中两个词都可以用，但表示“机会”时只能用chance, a chance in a lifetime表示“千载难逢的机会”。