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.
Suppose Jack’ s father is a heavy smoker, so was Mary’s mother. According to the speaker, what will happen
A．Jack is more likely to develop lung cancer. B．Mary is more likely to develop lung cancer. C．Jack and Mary have the same chance to develop lung cancer. D．Neither Jack nor Mary has the chance to develop lung cancer.