People said that there was gold in that cave转换句型

问题描述:

People said that there was gold in that cave转换句型
看例题:
People say that there is a strange creature in the Himalayas.
It is said that there is a strange creature in the Himalayas.
There is said to be a strange creature in the Himalayas.
下面这个句子可以改成这样吗?正不正确?把have改成be可以吗?
"People said that there was gold in that cave."
改成:
There was said to have gold in that cave.

People said that there was gold in that cave.
It is said there was gold in that cave.
There was said to be gold in that cave.
要用be不能用have