С, ! ) 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.
2. didn't understand
3. were reading
4. watched
5. was talking