1. This is a rare opportunity of which you should take advantage to get a better job.
2. The boy of whom you made fun is my cousin.
3. This matter, to which you should pay attention, is of great importance.
4. The woman to whom you gave place on the bus lives next door to me.
5. The examination in which I was successful lasted two days.
6. This is the result of our work, with which I am pleased.
7. There is a No parking sign of which we don’t take notice.
8. Mr. Brown is the man to whom I am responsible for my work.
9. Do you see my pen, with which I’ve just written the lesson?
10. We are crossing the meadow over which we flew kites in our childhood.