Mark the letter A, B, C or D on your answer sheet to indicate the word whose stress pattern is different from the others’ in each line

Mark the letter A, B, C or D on your answer sheet to indicate the word whose stress pattern is different from the others’ in each line:

4. A. valley                  B. volunteer                C. wardrobe                D. waterfall

5. A. reliable                B. remember                C. remove                    D. serious