题目内容
21. 我表姐很擅长音乐，她准备长大后当音乐家。
My cousin is good at music and she is going to be a musician when she .
21. grows up
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21. 我表姐很擅长音乐，她准备长大后当音乐家。
My cousin is good at music and she is going to be a musician when she .
21. grows up
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