First, 难道 is an adv We Chinses always use 难道 as the first words of a sentence. It could make your manner of speaking stronger. It means "really" or ."Is it possible that" or "Could it be said that" e.g: "Is it possible that Ashlee's new album is fabulous?" "难道Ashlee的新专辑不惊艳?" This is my first “answer” I wish could help you ；）