15．This is the necklace for which she is looking．

　　 1 6．Do you still remember the day which you joined the Party?

　　 1 7．This is the boy his handwriting is the best in our class

12．Father came back on April 4th when was my birthday．

1 3．Is this factory which you set up yourselves?

　 1 4．Is this the city where you visited last year?

11．He has written a book．the name of it I have forgotten．

10．I shall never forget the days when I spent with you·

9．Who is the man who is speaking to your mother?

8．Which is the clock which is made in China?

7．Shanghai is the biggest cit y，that has a population of more than ten million．

6．Is this all what you Wahl to say?

5．This is the very thing which I can tell you．

4．They are talking about the people and the things which they saw on their way home．