Choose the word (A, B, C, or D) whose main stress is different from the others in the group.
35. A. reason B. attract C. market D. shopping
36. A. backpack B. centre C. avoid D. reason
37. A. become B. special C. open D. product
38. A. pollution B. convenient C. affection D. factory
39. A. activity B. preparation C. enjoyable D. advantage
40 A. develop B. marvelous C. funnel D. damage
1 B
2 C
3 A
4 D
5 B
6 A