Questions 23 to 25 are based on the conversation you have just heard.

单项选择题A．Jogging is better than the other types of exercise.B．Heart disease is no longer an American national problem.C．Jogging can be harmful if the runner is not properly prepared.D．Warm-up suits are better than gym shorts and T-shirts for joggers.

单项选择题A．He was not affected at all.B．He didn’t publish stories during the Great Depression.C．It had little and indirect influence on Hemingway’s writing.D．He was greatly affected and wrote some first class works dealing with it.