Questions 18 to 20 are based on the
following passage. At the end of the passage, you will be given 15 seconds to
answer the questions. Now listen to the
passage.
According to the author, which statement is NOT true
A．One should know the jobs and living places of his customers. B．One can face the same challenges as his colleagues. C．One can identify the publications his customers read. D．One can evaluate himself.