－How was your day off yesterday?－Perfect! It was birthday of my grandpa’s . We had a big

发布时间：2020-08-20 23:03:13

－How was your day off yesterday?
－Perfect! It was      birthday of my grandpa’s . We had a big family celebration.
A. seventy    B. seventieth    C. the seventieth 

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解析：考查序数词。我爷爷七十岁的生日，“七十”要用序数词形式，在表述时前面加”the”表示“第七十”的意思。
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