题目内容
13.They are celebrating Betty'sninth(nine) birthday.How happy they are!分析 他们正在庆祝Betty的九岁生日.他们多么高兴啊!
解答 答案:ninth.
根据They are celebrating Betty's--(nine) birthday.How happy they are!可知他们正在庆祝Betty的九岁生日.他们多么高兴啊!句子中表示过第几个生日一般用序数词,nine的序数词是ninth.故填ninth.
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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