题目：
根据汉语意思完成下列句子
1. 今天是我的第三十个生日.
Today is __________ __________ birthday.
2. 你爷爷的生日是何时?
__________ is __________ __________ birthday?
3. 四月二十一是他们学校的庆祝日.
__________ __________ is their School Day.
4. 七月是一年中的第七个月.
July is __________ __________ __________ of a year.
5. 祝她生日快乐!
Happy birthday __________ __________!
答案：
1. my thirtieth 2. When, your grandfather's 3. April 21st 4. the seventh month 5. to her
