He was a brilliant musician as a boy but he never ______ his early promise.

　　A. completed B. concluded C. fulfilled D. performed

　　[fulfill]

　　fulfill 履行, 满足

　　[/fulfill]

　　[complete]

　　complete 完全, 完成

　　[/complete]

　　[conclude]

　　conclude 结论

　　[/conclude]

　　[perform]

　　perform 表演