She started to operate on his leg three hours ago(改为同义句) She has ____ on his leg ___ threehours.
问题描述：
She started to operate on his leg three hours ago(改为同义句) She has ____ on his leg ___ three
hours.
答
你好,很高兴能够在这里回答你的问题：
She started to operate on his leg three hours ago(改为同义句)
She has (operated) on his leg (for) three hours
她已经给他的腿做手术三个小时了.