艾伦在12岁时开始学习长笛。

Ellen started learning the ___flute at the age of 12.

我学习了长笛和其他古典乐器的历史。

I learned about the history of the ___flute and other classical instruments.

她在管弦乐队中演奏长笛非常优美。

She plays the ___flute beautifully in the orchestra.