1. The class had started when i arrived in class.
2. I got to my desk when other students were reading an article in the book.
3. Everybody had finished reading when i looked for the book in my school bag.
4. I found the book when everybody already finished the article.
5. I finished the article when the teacher was explaining something.
6. Teacher gave written exercise when i looked for my pen.
7. Teacher collects the work when i haven't finish it.
8. My classmates go home while i do the work.
