A、One that is designed for students of all ages. B、One that is taught by a university lecturer. C、One that is taken for interest

M: Mrs Durrell, can you tell us something about further and continuous education in Britain?
F: Further and continuous education in Britain can be of different kinds. Apart from the world-famous Open University, there are other colleges that can provide programmes of further education for adult students.
M: We all are quite familiar with the Open University. What about the other colleges?
F: Well, first, there are the polytechnics. The polytechnics are colleges or institutions of further education. They are study centres that offer many different courses for students of all ages. These courses lead to diplomas, or to degrees awarded by the Council for National Academic Awards which was set up to award degrees to adult students in non-university institutions.
M: And then, what about non-degree courses for adult students?
F: Second, there are specialist colleges, such as the Agricultural Colleges, Colleges of Art or Music, and so on. There are also a large number of local colleges of further education, technical colleges and colleges of commerce. All these special colleges provide a variety of non-degree courses for adult students.
M: What about the courses? Are they specially designed for adult students?
F: Courses for adult students may also be vocational or recreational, that is, they may be related to a person’s job or taken purely for interest and pleasure. Examples of popular recreational classes are pottery, woodwork; car maintenance; cookery, and so on. At the same time, university lecturers may give up some of their free time every week to talk to town and village clubs about anything from archaeology to the sociological effects of the industrial revolution.
Question No. 19 What is the topic of the interview?
Question No. 20 What are the polytechnics?
Question No. 21 According to the interviewee, what is a vocational course?
Question No. 22 Which of the following is NOT a subject for recreational classes?