2．What do we know about the concert organized by Whiteman?
A．It attracted more people to theatres.
B．It proved jazz could be serious music.
C．It made Gershwin leader of the orchestra.
D．It caused a debate among jazz musicians.
解析 细节理解题。根据原文第三段中In 1924, jazz musician and orchestra leader Paul Whiteman decided to organize a special concert to show that jazz was serious music .其中“show that jazz was serious music”和B选项是表达的一个意思，所以选B。
答案 B.
3．What did Gershwin do during his stay in Paris?
A．He created one of his best works.
B．He studied with Nadia Boulanger.
C．He argued with French critics.
D．He changed his music style.
解析 细节理解题。根据原文第四段中“It still remains one of his most famous works.”其中it指的就是An American in Paris，“one of his most famous works.”即A选项中的 one of his best works。
