Why can Taro speak English so well?

I wondered why people were staring at me.

Why don't you try to behave like a gentleman?

Why ask me? Wouldn't it be better to do it yourself?

I don't see why I should not do that.

I wonder why it's so crowded here today.

Why did you come home so late?

Why do they call New York the Big Apple?

Why did you call me at this unearthly hour?

What's the matter, dad? Why are you grimacing like that?