问题
选择题
—How was your day off yesterday?
—Perfect! It was my grandma’s ________ birthday. We had a big cake.
A. eighty B. eightieth C. the eightieth
答案
答案：B
考查数词的用法。表示“某人多大生日”应该使用序数词，且不需要使用定冠词。
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