I lost my wallet last week.It was found by a man.He was digging a hole in the street outside our house.

The wallet......which I lost last week was found by a workman who was digging a hole in the street outside our house........

Carol slammed the door behind her.Her father had given a car as a present.She drove off in it.

Slamming......the door, Carol drove off in the car her father had given her as a present.....................................

At the end of the street was a building.The street was crowded with shoppers.Tom had not noticed the building before.

At the end of the street.....which was crowded with shoppers, there was a building Tom had not noticed before......................