They believed that the Chinese invented paper

1. They believed that the Chinese invented paper.

It is …………………………………………

The Chinese …………………………………………..

2. People said that the President was killed by a mad man.

It was said that the President was killed by a mad man.

The President …………………………………………

3. They know that David left New York last week.

It is …………………………………………

David ………………………………………

4. People thought that John would leave for Hanoi.

John …………………………………….

It …………………………………………