Some previous study of music or performance experience is desirable though not a formal ________ for students wishing to take the course. ( 章节：1 难度：3)
- A、requirement
- B、commitment
- C、management
- D、assignment
正确答案:A
答案解析:有
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Some previous study of music or performance experience is desirable though not a formal ________ for students wishing to take the course. ( 章节：1 难度：3)
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