Проверьте,правильно ли составлены where do your sister is getting married? what is name of her boyfriend? when did they go a travel?

Where your sister is getting married? (убрать DO)
What is the name of her boyfriend?
When did they go to travel?

Вот так нужно:
When your sister is getting married? What is the name of her boyfriend? When they go on a trip?
Это правильно я точно знаю я изучаю английский с 6 лет, можешь довериться