I. Find the word with different stress in each line.
1. A. provide
B. prevent
C. contain
D. suffer
2.A. obese
B. headache
C. orange
D. answer
3. A. holiday
B. pollution
C. popular
D. restaurant
4. A. remember
B. concentrate
C. exercise
D. stimulate
5. A. football
B. weekend
C. disease
D. toothache
