Is this researsh center _______ the foreign guests visited l

Is this researsh center _______ the foreign guests visited l is this research center ___ the guests visited yesterday. Is this research centre （ ）the foreign guests visited last w 全国英语竞赛初三Is this reseach the foreign guests visited last week is this research centre _____the foreign guests visited last Is this research center ________ we visited the modern equip Is this research center _____ you visited the modern equipme is this the Computer center _____ you visited last week? Is this research center ___you visited the modern equipment Is this research center ___ you visited the modern equipment 1.IS this the exhibition___the foreign visitors visited last Is this just the city ____ the foreign guests wish to pay a