作业帮It has been proved that his theory is practical 怎么变为 His theory has been proved ( )如题
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/30 11:41:07
It has been proved that his theory is practical 怎么变为 His theory has been proved ( )
如题
to be practical
practical
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来源：学生作业帮助网 编辑：作业帮 时间：2024/05/30 11:41:07
It has been proved that his theory is practical 怎么变为 His theory has been proved ( )
如题
to be practical
practical