Ответ:
4.Does he have to travel a lot?
5.She will have to leave early.
6.How old do you have to be to vote in the USA?
7.We have to hurry.
8.What time do you have to go?
9. How long did you have to wait?
10. She had to do everything by herself.
Объяснение:
глагол have to-ставим в нужную форму; переводится "быть обязанным сделать что-то"