Read the passage and choose the best answer to fill in each gap

THE KOREAN EDUCATION SYSTEM

The Korean education system basically consists of primary schools, (26) ............. schools, high schools, and colleges or universities, with graduate courses leading to Ph.D degrees. Primary education is compulsory for children aged six to eleven. The basic primary school curriculum is generally divided into eight (27) ............ : the Korean language, social studies, science, (28) ............., ethics, physical education, music and fine arts. Students in secondary schools are required to take a number of additional subjects, such as English, and can take elective, such as technical or vocational courses. Afterwards, students can (29) ............. between general education and vocational high schools. (30) ............. general, high school tends to be strict, as college and university admission is very competitive.