PHẦN 3: ĐỀ ÔN LUYỆN THI PRACTICE TEST 8

 In 1991, the British government made it mandatory to wear rear seat belts in cars.

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Choose the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions.

 In 1991, the British government made it mandatory to wear rear seat belts in cars.

compulsory

optional

superior

imperative

Giải thích

Chọn B