Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions
GCSEs are not compulsory, but they are the most common qualifications taken by 14-16- year-old students
A. fulfilled
B. required
C. specialized
D. applied
Đáp án : B
Compulsory = bắt buộc = required