Question

【题目】Today is my mother's ______ birthday. I want to buy some flowers for her.

A. thirty B. thirteenth C. thirtieth D. thirteen

Answer 1

【答案】C

【解析】

句意：今天是我母亲三十岁的生日。我想给她买些花。考查序数词。A. thirty三十；B. thirteenth第十三；C. thirtieth第三十； D. thirteen十三。“某人的第几个生日”需用序数词表示，排除A、D两项；妈妈不可能是13岁，排除B项；可知选C。