TOEFL TPO -1 Academic Discussion Writing Sample: Life expectancies are increasing all over the world nowadays. Some of you probably know someone who is more than 100 years old. Before our next class, I want you to consider the following question: What factors do you think have contributed to the increase in life expectancy? Is it due to advances in medical technology, improvements in government services, changes in lifestyle habits, or something else entirely? • LingoLeap