单项选择题


Questions 11 to 13 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.

Which of the following is NOT mentioned as an advantage of advertisements

A.They brighten up railway stations and newspapers.
B.They lower the cost of any new products.
C.They make it easy to buy goods and to find jobs.
D.They are the source of certain company’s revenue.