Some students at the Open University left school 20 years ago. Others are（41）but all must be at least 21 years old. This is（42）example of how the Open University is different（43）all other universities. Its students must（44）work full-time or be at home all day,（45）instance, mothers of families. They do not（46）to pass any examination before they are（47）as students. This is（48）the university is called open. The university was（49）in order to help a（50）group—people who missed（51）a university education when they were young.The first name for the Open University was The University of the Air. The idea was to teach on the air, in other words,（52）radio and television. Most of the（53）is done like this. Radio and television have brought the classroom into people’s（54）. But this, on its own, is not enough for a university education. The Open University student also（55）advice at one of 283 study centers in the county. 36 weeks of the year he has to send（56）work to a tutor, the person who（57）him. He must also spend three weeks every summer（58）a full-time student. Tutors and teachers（59）and study together, as in other universities. At the end of the Open University’s first year, the results were good. Three or four students passed their examinations.（60）they do this every year, they will finish their studies in four or five years.