题目内容
8．Tim's uncle plans to have histhirtieth birthday party next week．（thirty）分析 提姆的叔叔下周打算举行他的三十岁生日聚会．
解答 答案：thirtieth．根据句意是说举办他的三十岁生日聚会，也就是他的第三十个聚会，修饰birthday，应该用序数词，前有修饰词his，所以这里无需再加the，thirty的序数词是thirtieth．故填写thirtieth．
点评 本题是考查序数词对的特殊用法，当然基数词转化成序数词的规则要牢记．
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