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Alice has cheered the boy up by singing a song改为被动语态

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Alice has cheered the boy up by singing a song改为被动语态
Alice has cheered the boy up by singing a song改为被动语态
以下这几种说法都是正确的,请挑选吧:
The boy has been cheered by Alice's song.
The boy has been cheered by the song Alice sang.=The boy has been cheered up by the song which Alice sang.
The boy has been cheered by Alice's singing a song.
The boy has been cheered by the song Alice has sung.