Question

Paul Wesley and lan somerhalder_______(is/are) handsome actors who _______(plays/play) the roles of Stefan and Damon Salvatore wonderfully.Actually,the show________(has/have) an amazing cast !

Answer 1

are , play , has essas são as respostas respectivamente

Answer 2

Paul Wesley and Ian somerhalder are handsome actors who plays the roles of Stefan and Damon Salvatore wonderfully. Actually, the show hás as amazing cast.
Usei o has no final pois se refere a elenco sendo referencial ao IT, e nos pronomes usa-se HAS para IT.