Why did you get lost in the woods?

Why do you have to work late?

Why is Mrs. Yamada popular in your school?

Why couldn't you sleep last night?

Why did you get so angry?

Why did you say such a thing to him?

Why didn't you attend the class meeting?

Do you know why the sky is blue?

It is difficult to understand why you want to go.

Why do you need to read such a book?