Помогите с английским, пожалуйста!)

1. I worked/was working as a journalist for 15 years.
2. I didn't understand/wasn't understanding the film even after Tom explained it to me.
3. We read/were reading the Sunday papers when Julia called.
4. Marina watched/was watching five DVDs on Saturday.
5. Susan talked/was talking to her colleague when her boss came into the office.