Mark the letter A, B, C, or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions.D. pollution

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Mark the letter A, B, C, or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions.

combustion

conservation

purification

pollution

Giải thích

Đáp án đúng là: A

Giải thích: Đáp án A phát âm là /tʃən/, các từ còn lại phát âm là /ʃən/.