A. Christmas B. channel C. chicken D. challengeĐoạn văn20/31IV. LANGUAGE FOCUS TASK 1. Choose the word whose underlined part differs from the other three in pronunciation in each of the following questions.ChristmaschannelchickenchallengeGiải thíchA. Christmas→ Christmas /ˈkrɪs.məs/ (ch = /k/)→ channel, chicken, challenge (ch = /tʃ/)