39. Educating new drivers is important for the __________ of accidents.

A. prevention

B. invention

C. inspiration

D. conservation

40. The floor __________ by the little kids.

A. was cleaning carefully	B. was carefully cleaned
C. was carefully cleaning	D. carefully cleaned

41. I prefer cooking _________the dishes.

A. to wash

B. washing

C. to be washing

D. to washing