Perguntas com "Why"

Why = por que?

A: Why are you late?
B:
A: Why do you come late?
B:
A: Why are you not happy?
B:
A: Why are some countries more important than the others?
B:
A: Why can't you run?
B:
A: Why didn't you do your homework?
B:
A: Why mustn't you smoke in public places?
B: 
A: Why wouldn't you like to travel?
B:
A: Why haven't you paid your electricity bill?
B:
A: Why do we eat?
B: