19. Who is working in the garden?- We.. .a) are; b)

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