Read these items of information and interview the imaginary participant of the conference. use the following expressions as introductions to your questions:
1. it is known
2. it is a well-known fact
3. it is believed ,
4. it is assumed
5. i've heard
6. i'm told in this connectionspeaking
7. i
8. could you tell me / could you speak on
9. would you tell me
10. i'd like to know