Match the two sentences：
1.I’m reading a book. The book is about Bill Gates.
I’m reading a book is about Bill Gates.
2.He is a teacher. The teacher teaches us Chinese.
He is a teacher teaches us Chinese.
3.I don’t like the man. He is smoking.
I don’t like the man is smoking.
4.Where is the picture? You bought it last week.
Where is the picture you bought last week?
关系代词(that, which, who, whom, whose)
关系副词(when, where, why)。