8． A.concern

　　B．case

　　C．incident

　　D．report

　　答案　A

　　解析　上文中提到的是一些专家担心经济方面的负担，由此结合选项及下文可知，另一个关心的事情是医疗费用的增长。在选项中，concern关心，关心的事，关系，符合语境。故选A项。

　　.阅读理解

　　Robert Todd Duncan was born in 1903 in the southern city of Danville，Kentucky.His mother was his first music teacher.As a young man，he continued his music study in Indianapolis，Indiana.

　　In 1930，he completed more musical education at Columbia University in New York City.Then he moved to Washington.For fifteen years，he taught music at Howard University in Washington.At that time，not many black musicians were known for writing or performing classical music.Teaching at Howard gave Duncan the chance to share his knowledge of classical European music with a mainly black student population.He taught special ways to present the music.These special ways became known as the Duncan Technique.

　　Besides teaching，Duncan sang in several operas with performers who were all black.But it seemed that he always would be known mainly as a concert artist.However，his life took a different turn in the middle 1930s.At that time，the famous American music writer George Gershwin was looking for someone to play a leading part in his new work Porgy and Bess.The music critic(评论家)of the New York Times newspaper suggested Todd Duncan.Duncan had almost decided not to try for the part as he knew it would not be easy to get it.But he changed his mind.He sang a piece from an Italian opera for Gershwin.He had sung only a few minutes when Gershwin offered him the part.He became famous because of the part in Porgy and Bess.

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