Mark the letter A, B, C or D to indicate A. infectious B. essential
14/15
Mark the letter A, B, C or D to indicate the word whose underlined part differs from the other three in the position of primary stress in each of the following questions.
infectious
essential
precaution
properly
Giải thích
Đáp án:D
Giải thích:Đáp án B, C, A trọng âm 2. Đáp án D trọng âm 1.