Questions 29～30 are based on the
following news from the BBC or the VOA. At the end of the news item, you will be
given 10 seconds to answer the two questions. Now listen to the
news.
According to Roger Noriega, the turbulent period in Latin American was caused by ______.
A．his unsuccessful work B．the inadequate interventions from the U. S. C．the immature democratic institutions of some Latin American countries D．some political leaders