Pick out the word whose main stress is placed differently from the others.
16. A. invent B. interact C. develop D. control
17. A. advance B. edition C. experience D. scenery
18. A. deposit B. intermediate C. amount D. appearance
19. A. reputation B. difficult C. possible D. excellent
20. A. expensive B. dormitory C. agreement D. vacation
16B
17D
18B
19A
20B
16 B
17 D
18 B
19 A
20 B