VI. Find the word which has different sound in the part underlined:
16. A. cookers B. fans C. pens D. pots
17. A. rubber B. club C. put D. cupboard
18. A. schoolbag B. compass C. villa D. breakfast
19. A. sink B. fridge C. dishwasher D. light
20. A. judo B. sofa C. poster D. air-conditioner