IV.1.Christopher apologized us for having forgotten to pay the bill

2.After having repaired the car, tom took it out------

3.Having stood there, the porter dreamt of a new job

4.As being her father's youngest child, natashsa______

5.I usually read the book which had been written by my uncle

6.Having left the phone ring for 5 minutes, he then slowly replaced the receiver

7.After having worked hard all day, sarah was exhausted

8.We had seen rupert looking into a shop window

9.Having spent all his money, Daniel couldn't afford a new jacket

10.Computers which have become very popular in the world, are used for many purposes