Answer the following questions：
Is there any government-owned television network in the United States?
What is ITC responsible for?
What are the three commercial terrestrial television services of ITC?
Do the British and American people spend a lot of time watching TV?
What are the influences technological advances have made upon mass communications?
What are the two main radio and TV broadcasting companies in Britain?
What programmes do various television channels providing?
Where does American public television get its funds?
What programmes does BBC2 transmit?
What programmes does BBC1 transmit?
What do mass media traditionally include?
What are the functions of mass media?
What does a typical day's commercial TV listing include?