Why do people get fooled by such cheap schemes?

I missed the bus, that's why I was late for work.

I just can't understand why he did that.

Why don't we go out for dinner tonight?

Why don't you try the new restaurant in town?

Why are you asking me that? What's the big idea?

Why don’t you take a trip alone together?

Why did you marry John, of all people ?

Why did she break off her speech?

Why don't you give it a shot and see how it goes?