题目内容
2．It was my cousin'sninth（第九）birthday yesterday．分析 昨天是我表弟的九岁生日．
解答 答案：ninth．根据"______（第九）birthday yesterday"可知"第九"要用序数词ninth，修饰birthday．故填ninth．
点评 首先要掌握一些常见的序数词的拼写，然后结合给出的汉语提示，就可以确定正确答案．
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