I: choose the word whose main stress is placed dijjerentlly from the others:
1/ a. Appointinent. b. Helpful. c. Toothpaste. d. Harvest
2/ a. Absent. b. Disapppear. c. Measure.
d. Normal
3/ a. Stomach. b. Earache. c. Disease.
d. Virus
4/ a. Unpleasant. b. Problem. c. Horrible.
d. medicine.
5/ a. Turle. b. Useful. c. Present. d. Material.