完形填空。

    This is a photo 1 a classroom. It's2 classroom. Look 3 the walls (墙). They4 white. You can see5old photo 6 the wall. What can you see7 the photo? This is 8 desk. 9 English book is on it. These are 10. They're on the desk too.

请以“合作”为话题，写一篇文章。题目自拟，除诗歌外文体不限。600字以上。