题目内容
16.Today is his father'sfiftieth ( fifty ) birthday.分析 今天是他父亲五十岁的生日.
解答 答案:fiftieth
所给词fifty为基数词意为"五十",根据句中空格前有名词所有格his father's,后面有所修饰的名词birthday,可知需填入序数词表达顺序.又知fifty相应的序数词为fiftieth,故答案为fiftieth
点评 本题为完成句子题,在做类似题时首先充分理解句意和分析句子结构,然后确定所给词的正确形式,这里是考查序数词的用法还要注意单词拼写.
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