问题标题:
【Thestudentsarebusywiththeirhomework同义句转换】
问题描述:
Thestudentsarebusywiththeirhomework同义句转换
李春华回答:
Thestudentsarebusydoingtheirhomework
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Thestudentsarebusywiththeirhomework同义句转换