I live in Room 403, Sam lives in the room right above mine, on the _____ floor.
We wondered __________ this afternoon.
The little boy was last seen __________ football by the river.
They found __________ impossible to finish so much work in such a short time.
— I rang the bell for a long time last night, but no one opened the door.— Oh, the family __________ a party and they didn’t hear the bell.
Great changes __________ in my hometown in the last five years.