Question

【题目】—What are you going to do this Saturday?
—I am going to the old people's home to celebrate Mrs. Green's______ birthday.
A.ninty-ninth
B.ninety-ninth
C.ninety-nineth

Answer 1

【答案】B
【解析】句意：--这个周六你打算做什么？--我打算去敬老院为格林夫人庆祝九十九岁生日。one's +序数词+birthday，某人……岁生日。几十变序数词时只要各位变成序数词就可以，nine去掉e加th变成序数词ninth，故选B。