Questions 14 to 17 are based on the following passage.
At the end of the passage, you will be given 20 seconds to answer the
questions. Now listen to the passage. What is the main topic of this passage
A．Sir William Johnson’s role in colonial America. B．The trade patterns of the Iroquois nation. C．Sir William Johnson and the American Revolution. D．The British-French conflicts in the 1700’s.