3．You are looking for the doctor．He is in the room．

2．I received a letter yesterday．It was from my father．

1．The man is sitting in the corner．He is my brother．

15．The man couldn't believe what Tom said．

The man couldn't believe _______ _______．

C)用适当的关系代词将下列每题中的两句合并成一句。(5分)

14．He is so old that he can go to school．

He is _______ _______ _______ go to school．

13．The problem is so difficult that nobody in our class can work it out．

The problem is _______ difficult _______ _______ in our class _______ work out．

12．He found English was very difficult．

He found English _______ _______．

11．The woman doesn't know how she can get to the station．

The woman doesn't know _______ _______ _______ to the station．

10．After he said these words，Mr Green left the classroom．

_______ _______ _______，Mr Green left the classroom．

9．They met Mr Wang when they went to the school library yesterday．

They met Mr Wang _______ _______ _______ _______ the school library yesterday．