He used sand to put out the fire.=He _ _ the fire _ _.

问题描述:

He used sand to put out the fire.=He _ _ the fire _ _.
Zhang Ming was glad that he helped Mrs Wang=Zhang Ming was glad _ _ Mrs Wang
The smoke in the room is very heavy.=There is _ _ _ _ in the room.
He ate something after he saw the doctor.=He_ _ _ _ he saw the doctor.

put out,with sand
to help
a very heavy smoke
didn't eat anything until