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15. This house which was built in 1960 is used as a library now.
16. The children were talking about the lion-tamers, most of which they admired.
17. The dictionary which you borrowed from our school library this morning is on the table.
18. The woman whom you saw yesterday on the way home is a librarian.
19. Do you want to meet the man who is living next door to me?
20. I saw several houses, most of which were quite good.
21. I've sent him two letters, neither of which he has received.
22. I'll introduce you to the man whose support is necessary for our project.
23. Max isn't home yet, which worries me.
24. Last week I went to see the house where I used to live.
25. The life is very hard, which makes her unhappy.
