The key to exercise solutions in chapter 9 - Grammar for the textbook New Headway Pre-Intermediate - Workbook with authors Liz Soars, John Soars and Paul Hancock from Oxford University Press
Question
Make sentences from the table.
Answer
I was hungry because I hadn't eaten anything all day.
I was tired because I hadn't slept well the night before.
I didn't have any money because I'd spent it all on clothes.
I was late for work because I hadn't set the alarm on my phone.
My mother was worried because I hadn't rung her for a week.