Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits the numbered blanks.

Some people return to college as mature students and take full- or part-time training courses in a skill will help them to get a job. The development of open learning, (16)______ it possible to study when it is convenient for the students, has increased the opportunities available (17)______ many people. This type of study was formerly restricted to book-based learning and (18)______ course but now includes courses on TV, CD-ROM or the Internet, and self-access courses at language or computer centers.

Americans believe that education is important at all stage of life and should not stop (19)______ people get their first job. About 40% of adults take part in some kind of formal education. About half of them are trying to get qualifications and skills to help them with their jobs, the (20)______ are taking recreational subjects for personal satisfaction. Schools and community colleges arrange evening classes, and a catalog of courses is published by local boards of education.