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