1.Is this the book your father bought it for you?
2.Who is the comrade you talked with him?
3.Have you been to the place where she works there ?
4.They are talking about the people and the things which they saw on their way home.
5.This is the very thing which I can tell you.
6.Is this all what you Wahl to say?
7.Shanghai is the biggest cit y，that has a population of more than ten million.
8.Which is the clock which is made in China?
9.Who is the man who is speaking to your mother?
10.I shall never forget the days when I spent with you
11.He has written a book.the name of it I have forgotten.
12.Father came back on April 4th when was my birthday.
13.Is this factory which you set up yourselves?
14.Is this the city where you visited last year?
15.This is the necklace for which she is looking.