【答案】一How old is your younger brother, Tom?

一How old is your younger brother, Tom?

一____ . And we had a birthday party for his ____ birthday last week.

A. Ninth;nine B. Nine;nine C. Nine; ninth D. Ninth;ninth

【答案】

C

【解析】

句意：-汤姆，你弟弟多大了？-九岁。上周我们为他的第九岁生日开了一个生日派对。nine基数词，九；ninth序数词，第九。年龄用基数词表示; 第九个生日，表示顺序，用序数词。故选：C。