Ex6: 1. I (word) ____ all day, so I didnt want to go out. 2. She (sleep) ____ for ten hours when I woke her. 3. They (live) ____ in Beijing for three years when he lost his job. 4. When we met, you (work) ____ at that company for six months. 5. We (eat) ____ all day, so we felt a bit ill. 6. He was red in the face because he (run) ____. 7. It (rain) ____ and the road was covered in water. 8. I was really tired because I (study) ____. 9. We (go) ____ out for three years when we got married. It (snow) ____ for three days. y/c giải thích rõ