Complete the sentences with the Past Perfect or Past Simple. 1. When I left my school, I ... (realise) that I ... (forget) my English textbook. 2. She was happy because she ... (take) the 1st place in the competition. 3. He ... (buy) the car by the time I got there. 4. I ... (not listen) to the joke because I ... (hear) it before. 5. When he ... (arrive) at the station, his train already ... (leave