I don't see why you should differentiate between "wh" questions and any other type of question. If it finishes with a question mark, it's a question.
What did Juan do after he got up?
Was it raining when he got up?
Is there anyone else in the house?
Who came to the house after breakfast?
Do we know when it stopped raining?
Those are all questions. It really doesn't matter what type.
You don't really need to say "complete the answers to the questions", you can just put "After reading the story, answer the questions".