1. [ambition] Jack is an ( ) boy; he wants to become as famous as Edison.

2. [authority] I have ( ) him to act for me while I am abroad.

3. [inform] Can you give me any ( ) about this matter?

4. [retire] There have been several ( ) recently.

5. [invite] I received an ( ) card to her birthday party.

答案:  ambitious; authorized; information; retirements; invitation;