Questions 11 to 13 are based on the
following passage. At the end of the conversation, you will be given 15 seconds
to answer the questions. Now listen to the
passage.
What is the purpose of the speaker
A．To warn us of the danger of smoking before children. B．To warn people with breathing problems not to smoke. C．To warn that mothers who smoke may affect their children. D．To warn that fathers who smoke may affect their children as mothers.