Read and complete the text below?

Read and complete the text below. Use the given verbs in simple past or past perfect i _______ (Know) it. She wanted me to give her back a book she_______ (Lend) me, but i ________ (not find) it. I was always late for school and generally the reading sessions ________ (already start) when i ________ (arrive). Before i ________ (get) to school on the last day of class, i _______ (already lose) the book. I never ______ (discover) what _______ (happen).