Choose the correct option to complete the text.

1. There was bad traffic yesterday and I arrived late at school. The lessons had already started/ already started/ was already started
2. When I entered my classroom, my classmates were working/worked/had worked on a project
3. I was saying/said/had said I was sorry and was joining/joined/had joined one of the groups.
4. The students in my group wanted/were wanting/had wanted to borrow my dictionary because they had worked/were working/worked on a multi-lingual presentation, but I unfortunately had left/was leaving/left it at home.