KỲ THI THỬ THPT QUỐC GIA NĂM 2019 MÔN TIẾNG ANH(P18)

Certain courses are compulsory; others are optional

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Mark the letter A, B, C, or D on your answer sheet to indicate the word OPPOSITE in meaning to the underlined word(s) in each of the following questions.

Certain courses are compulsory; others are optional

free

voluntary

pressure

mandatory

Giải thích

D

Optional (adj) = tùy chọn. Mandatory = compulsory = bắt buộc