题目内容
16.Jack is busy preparing for a party to celebrate his sister'stwelfth(twelve) birthday.分析 Jack正忙着准备一个派对庆祝他妹妹12岁的生日.
解答 答案:twelfth
一般序数词用来指明先后的顺序或一系列事物按照一定的规律排列时,要在该序数词前面加定冠词the,但当该序数词前面有诸如his、her、their 等物主代词或者其他修饰语时,则不用定冠词the.根据题意"his sister's…(twelve) birthday",表示"他妹妹12岁的生日"要用序数词表述,修饰birthday,结合所给词twelve为基数词其对应的序数词为twelfth意为"第十二"故答案为:twelfth
点评 本题考查用所给单词的适当形式填空,首先要根据语境明确句意,然后再根据相关语法对所给单词在形式上做出正确的变化
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