I am French, is my text correct?

Another kind of musical exists. These are juke-box musicals, such as "Mamma Mia," which used songs written by the band Abba. English musicals deal with social issues as tolerance. For instance, the last expression of West Wide Story left a message of tolerance. By the end of the sixties, musicals became really integrated, with black and white actors, as seen in Hair. In the seventies, rock musicals appeared and some of those rock musicals began with an album and then moved on to become films such as "Tommy". Just a word about that film: it's a famous rock-opera written by The Who. The main part is played by the singer of the Who. So let's look at one scene to give you a view of what a rock musical is.