her friend's birthday is in december.改为疑问句 their birthdays are in october.改为一般疑问句
问题描述：
her friend's birthday is in december.改为疑问句 their birthdays are in october.改为一般疑问句
答
1、Which month is her friend's birthday in？
2、Are their birthdays in october？
答
Is her friend birthday in december? are their birthdays in december?
答
很高兴能够在这里回答你的问题,应该为：
When Is her friend's birthday
Are thier birthdays in October?
答
Is her friend's birthday in December?
Are their birthdays in October?