1.表示特定的人或东西。

　　Give me the magazine.

　　Have you decided on the prices yet?

　　The book on the table is an English dictionary.

　　Beijing is the capital of China.

　　2.复述前文提到的人或东西。

　　Last week， I saw a flim. The film is about a love story between two middle-aged people.

　　The old man saw a house in the field. He went into the house and found a beautiful girl sitting there and singing.