When is your birthday?的同义句

题目

When is your birthday?的同义句
是What is your date of birth?
还是What is your date of birthday?

答案

1. When is your birthday?
= What is your date of birth?
≠ What is your date of birthday?
2. 解释：
birthday本身就是“生日”那一天,和date“日期”重复了.