有没有变化格式要求?否则有很多种变化形式,如：
1.= He prefers pop music to classical music.
2.= Amy,whose photos are on show,is one of the most famous photograhers.
= Amy,the photos of whom are on show,is one of the most famous photographers.
= Amy,of whom the photos are on show,is one of the most famous photographers.
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