HIGHER EDUCATION SƯU TẦM VÀ BIÊN SOẠN
21. Is English a compulsory subject or a(n) _______ one at high school here?
A. obligatory
B. mandatory
C. obliging
D. optional
21. Is English a compulsory subject or a(n) _______ one at high school here?
A. obligatory
B. mandatory
C. obliging
D. optional