B )1.If Brain is only free on the evening of May 21st,he can enjoy A.Haydn's Trumpet Concerto B.Spanish ballet C.opera classic D.Mozart's Flute Concerto 导航页导航页 ( )1. If Brain is only free on the evening of May 21st, he can enjoy . A. Haydn’s Trumpet Concerto B. Spanish ballet C. opera classic D. Mozart’s Flute Concerto B