Read the passage carefully then answer the questions below Higher education is given in colleges and universities. The average course is four years. Students choose a major and take courses in this subject. After four years they get a bachelor degree. Then the students may go on to graduate school and, with a year or two of further study, get a master's degree. After another two or three years of study, they may get a still higher degree as doctor of philosophy. Higher education trains people to become teachers, nurse, engineers or do other professional work. Lawyers and doctors must go to school longer than four years. 1. What degree do students get after four years of higher education? 2. How long does it take a student to obtain a master's degree? 3. Who must go to school longer than four years? 4. How long is the average course in an American university? 5. How long is a student trained into a teacher?