19. who is working in the garden? - we….. a) are; b) do; c) is; d) have. 20. where….my sisters travelling now? a) have; b) do; c) are; d) is. 21. the antonym for the verb “to turn on” is…. a) turn at; b) turn in; c) turn of; d) turn off. 22. when it is cold in the room, my father turns on….. a) gas; b) hot water; c) washing machine; d) central heating