Помогите, пожалуйста, ответить на тест:26. She wants _____ why you decided

Помогите, пожалуйста, ответить на тест:
26. She wants _____ why you decided _____ the meeting earlier.
A. to know; leave B. know; leave
C. to know; to leave D. know; to leave

27. I dont think they will _____ the competition.
A. to win B. have won C. winning D. win

28. There are not _____ conveniences in the house.
A. some B. no C. any D. much

29. I don t want to depend too much _____ my parents.
A. by B. on C. at D. with

30. Before you leave, dont forget to turn _____ the light.
A. off B. on C. over D. under