In this section, you will hear several passages, listen
to the passages carefully and then answer the questions that
follow. Questions 11 to 14 are based
on the following passage. At the end of the passage, you will be giv en 20
seconds to answer the questions. Now, listen to the
passage. What is the passage mainly about
A．The history of advertisement. B．The functions of commercials on television. C．Arguing for the benefits of advertisements. D．Telling people to be aware of the false advertisements.