----- Nội dung dịch tự động từ ảnh ----- 9. We were visiting our grandparents over the weekend when it (starting / started) to rain heavily. 10. My grandfather (read / was reading) the newspaper at that time.
Exercise 5. Fill in the blanks with the correct form of the verbs. 1. She ________________ (sing) a beautiful song on stage when the microphone stopped working. 2. He ________________ (study) for three hours last night when his roommate came in and started playing loud music. 3. They were swimming in the ocean all day when they ________________ (see) a school of dolphins. 4. I was finishing my work early today when my boss ________________ (call) me into a meeting. 5. We ________________ (drive) to the mountains for our vacation when we got stuck in traffic. 6. You were cleaning the entire house before the guests ________________ (arrive) when you accidentally broke a vase. 7. The dog ________________ (bark) loudly all night because it heard a noise outside. 8. He was sleeping through the alarm clock this morning when his roommate ________________ (wake) him up. 9. She ________________ (draw) a picture of her family when her little sister spilled juice on it. 10. They ________________ (climb) to the top of the mountain when it started to rain heavily.