用适当的关系代词that, which, who, whom, whose填空

1. Here comes the girl _____ pronunciation is the best in our class.

2. Those are the things _____ I lost in the street yesterday.

3. He is the doctor _____ we often talk about.

4. She missed the things and persons _____ she loved.

5. We may go to our own library to look up any information _____ we need.