Multiple interrogatives, questions with multiple wh-phrases (e.g. Who bought what?), have long presented analytical challenges for linguistic theory. This monograph presents a new theoretical and experimental study of this construction. The theoretical findings concern the interaction between superiority effects, subject-auxiliary inversion, and the distribution of pair-list and single-pair readings cross-linguistically. The author examines multiple interrogatives under sluicing (i.e. clausal ellipsis), presenting new arguments for the deletion analysis of sluicing