----- Nội dung dịch tự động từ ảnh ----- T'opic 10: Exercise 1: Underline the correct form. 1. When Anne opened / had opened the door, she realized that somebody broke / had broker into. 2. He couldn't make a sandwich because he forgot /had forgotten to buy bread. 3. Clyde Tombaugh discovered / had discovered the planet Pluto in 1930. 4. By the time Julia left / had left the shop, she spent / had spent all her money on clothes. s. I didn't want/ hadn't wanted to see that film because I saw / had seen it twice. 6. Philip tidied / had tidied his bedroom before he left / had left for work. 7. Alfred had worked /worked in a bank for five years before he was sent to Rome. 8. He doubted that he saw /had seen her somewhere before. 9. After he had / had had a good night's sleep, he felt / had felt much better. 10. After arriving home, I realized / had realised I didn 't buy / hadn't bought any milk.