She doesn't want to join the music club because she is not interested in music.
解析:
这道题考察的是英语的基本句型和词汇。'be interested in'表示'对……感兴趣','because'用来引导原因,'doesn't want to'表示'不想','music club'是'音乐俱乐部'的翻译。根据这些信息,我们可以把句子翻译为: 'She doesn't want to join the music club because she is not interested in music.'