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18. In the UK, it is _____ for the bride to throw her bouquet of flowers into a crowd of well - wishers. (CUSTOM)
19. Voice _____ is the app which helps some types of smartphone attract customers. (RECOGNIZE)
20. Accessing to _____ information harms your mental health. (APPROPRIATE)
21. Pike claimed they had _____ against him because of his nationality. (DISCRIMINATION)