III. Find one word which does not belong to each group.
1 A. interesting B. exhausting C. tired D. exciting
2 A. pilotless B. airplane C. driverless D. careless
3 A. plot B. documentary C. horror D. thriller
4 A. festival B. celebration C.tradition D. dishes
5 A. wind B. wave C. sun D. coal
6 A. airplane B. helicopter C. jet D. submarine
7 A. hydropower B. panels C. cells D. solar
8 A. however B. but C. so D. nevertheless
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