题目内容
16.Jack is busy preparing for a party to celebrate his sister'stwelfth(twelve) birthday.He wants to give her a big surprise.分析 Jack正忙着准备聚会为了庆祝他妹妹的十二岁生日.他想给她一个大大的惊喜.
解答 答案:twelfth
联系语境,根据给出的提示词twelve,其后有名词birthday,可知前面的数词应该是作birthday的定语起修饰作用;根据数词的知识,断定此处应该用基数词twelve的序数词形式twelfth,意为"第十二",表顺序,这里指"妹妹的第十二个生日",也就是"十二岁生日".在前有物主代词修饰的情况下,序数词前不必再用定冠词the,以避免重复.故填写twelfth.
点评 此题考查基数词与序数词的选择和转化.做题时一定要结合语境并抓住句中的关键部分做出准确判断.并注意序数词的特殊变化形式.
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