1. Is this the factory ________ I visited last year?

2. Is this the factory _______ I worked last year?

3. Is this the factory _______ produces all kinds of TV sets.

4. Is this the very factory ______I visited last year?

5. Is this factory ______ I visited last year? key:

6. This is the school ____ we studied together ten years ago.

7. I will never forget the day _______ we spent together.  

8. I will never forget the day ________ we studied together.

9. This is the reason ________ he was absent.

10. This is the reason _______ can explain his absence.  

11. I often thought of my childhood, ____ I lived on a farm.  

12. Winter is the time of year ____ the days are short and nights are  long.

13. In an hour, we can travel to places _____ would have taken our ancestors days to reach.  

14. Women _______ drink more than two cups of coffee a day have a greater chance of having heart disease than those ________ don’t.  

15. Look out! Don’t get too close to the house ______roof is under repair.

16.—Do you have anything to say for yourselves?

—Yes, there’s one point ________we must insist on.

17. We’re just trying to reach a point ____ both sides will sit down together and talk.  

18. The owner of the cinema needed to make a lot of improvements and employ more people to keep it running, ______ meant spending tens of thousands of pounds.

19. She was educated at Beijing University, ______She went on to have her advanced study abroad.

20. I was given three books on cooking, the first _______ I really enjoyed.