Ⅰ.阅读理解
阅读下列短文，从每题所给的四个选项(A、B、C、D)中，选出最佳选项。
A
George Gershwin，born in 1898，was one of America’s greatest composers.He published his first song when he was eighteen years old.During the next twenty years he wrote more than five hundred songs.
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