he thinks that it is difficult for a robot to do the same things as a person 翻成同义句.
问题描述：
he thinks that it is difficult for a robot to do the same things as a person 翻成同义句.
He thinks ____ ____ for a robot todo the same things as a person,
用这种句式.
答
it difficult
这里it 做形式宾语,所以省略谓语is