用非限制性定语从句连接两个句子
She has two daughters； they both married rich men.
He visited the Great Wall again. He went there two years ago.
He failed in the examination. It made his father very angry.
He must be from Africa. It can be seen from his skin.
He has two sons. Both of them work as chemists.
He is a man of great experience. Much can be learned from him.
I have many books. Some of them are on chemistry.
He met two old friends yesterday in the street. He hadn't met them for years.
The man is in the next room. He brought our text-books here yesterday.
The magazine is mine. He has taken it away.