Opened vs Closed question

Are you feeling better today?

Will you please do me a favor?

Have you already completed your homework?

Can I help you with that?

Does four plus four equal eight?

Are you pregnant?

Would you like to go to the movies tonight?

What are you planning to buy today at the supermarket?

What is your favorite memory from childhood?

How will you help the company if you are hired to work for us?

What sights do you expect to see on your vacation?

How do you go about booking tickets for a flight?

What is the quickest way to get to the pet store in town?

Why can't I come along with you?

How exactly did the fight between the two of you start?