1, I bought a cell phone which I can use to send and receive e-mail.

2, My new cell phone, which I only bought it a month ago, has become a necessary part of life.

3, Where is the ruler that I left on this desk?

4, Swan, whose bike was an unusual design, won a medal.

5, The girl who spoke to me turned out to be in my class.

6, The people whose luggage was lost had to wait a long time.

7, My bike, which I had left at the gate, disappeared.

8, Tom, who couldn’t see the screen, decided to change his seat.

9, I am reading a book which was written by Mark Twain.

10, He met many friends who encouraged him to do his work.

11, He often tells me about this village in which he was born.

12, Can you understand the question which he asked you last time?

13, The man whose son we play with every day is an architect.

14, The city which we spent our vacation in was very beautiful.

15, The train which arrived two hours late broke down twice on the way.

16, I stopped in a small town which my sister was working in.

17, The book which I gave him was rather difficult.

18, She is the girl who I bought roses for.

19, The picture which you were talking about has been stolen.

20, The movie which we saw last night wasn’t very good.

21, The village which I grew up in is beautiful.

Chúc bạn học tốt!