1. There is nothing more that we can do about the fire.
2. The postman which works in this village is very old.
3. I saw the girl that helped us last week.
4. Students who arrive late will not be permitted to enter the classroom.
5. John, who was taken by surprise, hardly knew what to say.
6. We drove along the road that was still flooded after the heavy rain.
7. Mr.John, who taught my son, is my neighbour.
8. The envelop which lies on the table has no stamp on it.
9. My brother, who met you yesterday, works for a big firm.
10. Do you know the boy who broke the windows last night?
11. John is the youngest person who takes part in the race.
12. Here is the form that you must fill in.
13. English is an important language which we have to master.
14. This is the only student who can do the problem.
15. I have many homework that I must do.
16. There are six letters which have to be written today.
17. The dog which has some black spots is Ba’s.