SCHOOL EDUCATION SYSTEM SƯU TẦM VÀ BIÊN SOẠN
16.
Core subjects are _______ in national exams at certain stages of the school education system.
A. paid for
B. compulsory
C. score
D. core
16.
Core subjects are _______ in national exams at certain stages of the school education system.
A. paid for
B. compulsory
C. score
D. core