The last time I- Alisher was in 2018.a)saw b)haver seen c) see d)had seen​

Potap and Nastya - a phenomenon in modern show business. The combination of a producer, composer, author, producer and show Maine Potap and beauty, vocalist Nastya, in and of itself was doomed to success. But such a mega, as the duo won, not expecting anyone, even the members of the project. Potap and Nastya - is Shtirlits and radio operator Kate, Vasily and Anka machine gunner, is Ken and Barbie. This folk heroes and popular characters. Scandalous and shocking, glamorous and collective farms, but most importantly a super hit and fresh, they are blown away millions of listeners and viewers. Potap and Nastya - is the most-most. The best-selling, most touring, the most popular, etc. Behind them super regalia and awards: Grand Prix "Five Stars" Song of the Year, Golden Gramophone, Muz-TV and many others. Their songs - record sales and distribution of mobile content. They set records visiting venues.