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john,how old is your grandfather. ------- .we had a party fo

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john,how old is your grandfather. ------- .we had a party for his-------birthday last week[eight]
用括号里的正确形式填空
john,how old is your grandfather. ------- .we had a party fo
eighty 既然已经是爷爷了,肯定是八十岁,不会是十八岁.
第二,他的第八十个生日.
eightieth
再问: 为什么是eightieth
再答: 因为 eighty 是基数词。这里是第八十个生日,要改成序数词。 eighty 的序数词就是把 y 变成 ie, 再加th。