问题
选择题
Jack is _________years old. Today is his _________ birthday.
A．sixteenth; sixteen
B．sixteen; sixteen
C．sixteen; sixteenth
D．sixteenth; sixteenth
答案
答案：C
题目分析：基数词可以表示年龄，第···岁生日用序数词。句意：杰克十六岁了，今天是他的十六岁生日。故选C