13． The desk ____ ____ Tom is leaning is Jack's. It's covered with dictionaries.

12． Ours is beautiful school with a long history, ________ we are proud.

11．Did you attend the meeting yesterday ________ Mary talked a lot?

10．He built a telescope ____ ____ he could study the skies in his free time.

9．This is the song ____ ____ I often listen in the Globle Dance Hall.

8．Do you remember the building ____ ____ flew a red flag all the year round?

7．Who do you suppose is the man ____ ____ our teacher is talking?

6．Thank you for your help, ____ ____ we could not have finished the work in time.

5．The bike ____ ____ he went to school was stolen last week, which made him feel sad.

4．He borrowed a book the other day, the author ________ is a worker.