JOHN'SV CANH☆ ☆ ☆Johnny Cash Duo Has SanBen DaleSAN BLNITO - Johnnj Cash and Duo, described as the most promising new countr\ artist, will appear in person at the Rol lercade in San Benito in two shows, at 7 p.m and 9:30 p. m Wednesday.Also appearing on the program will be Jesse Turner and BiUyMoon.i After less than nine months in the entertainment field. Cash was i invited to become a regular mem-ber of the cast of Grand Ole , Opry, and since has been much ( in demand for personal appear-s ances over the U.S.