Trắc nghiệm: Mark letter A; B; C or D to indicate the word whose underlined part is pronounced differently from that of the others in each group,Mark letter A B C or D to indicate the word whose underlined part is pronounced differently from that of the others in each group,Mark letter A: B; C or D to indicate the word whose underlined part is pronounced differently from that of the others in each group,Mark letter A. B. C. or D to indicate the word whose underlined part is pronounced differently from that of the others in each group.