Mark the letter A, B, C or D to indicate the word that differs from the other three in the position of primary stress in each of the followings

Mark the letter A, B, C or D to indicate the word that differs from the other three in the position of primary stress in each of the followings.

Question 3. A. schedule B. clever C. cartoon D. viewer

Question 4. A. comedy B. audience C. character D. entertain