Why say telecommunication is the multiplier of productivity?

Why don't you give it a try ?

Why did he fail in business?

Why are '0.3' pencil leads so expensive?

Why don't we have dinner together?

Why don't you try a new hobby?

Why did Bill tear the letter into pieces?

Why don't you try a different tack?

Why don't you tell her directly?

Why don't you come to the movies with me?