单项选择题
You will hear three pieces of recorded material. Before listening to each one, you will have time to read the questions related to it. While listening, answer each question by choosing [A], [B], [C] or [D]. After listening, you will have time to check your answers. You will hear each piece once only. Questions are based on a brief review on American music. You now have 30 seconds to check your answers to Questions
Which of the following statement about the black music is TRUE（）
A．Ragtime was the peak of the new American music called jazz.
B．Before ragtime American blacks had their own music tradition which had developed in public for more than 250 years.
C．Ragtime is a special effect of a double rhythm.
D．There was nothing new in the ragtime style.