问题描述： ls your grandfather happy on his _____(九十)birthday? 1个回答 分类：英语 2014-10-16 问题解答： 我来补答 ls your grandfather happy on his (ninetieth 九十)birthday?要用序数词‘ 在他九十岁的生日’如果不明白,请再问；如果对你有所帮助,请点击本页面中的“选为满意回答”按钮,谢谢! 展开全文阅读
