Blues is a form of music that came from the American South, where slaves on plantations ________ spiritual songs and work music

Mark the letter A, B, C or D to indicate the correct answer to each of the following questions.

Blues is a form of music that came from the American South, where slaves on plantations ________ spiritual songs and work music.

• A. will sing
• B. would sing
• C. must sing
• D. should have sung