Tiếng Anh Lớp 9: 1. We (sit)___________ at a breakfast table when the doorbell (ring)_____________ 2. He ( hear)____________ a loud bang while he ( talk)______________ to his friends. 3. when they (leave) _______________ the museum, the sun(shine)________ 4. The students (play) _________________, their parents( come)_________________ home. 5. It( start)____________ to rain while she ( water) ___________________ the flowers in her garden. 6. The students (play)____________ cards at 9a.m yesterday. 7. When I (open)___________ the door, It ( rain) ________________ yesterday. 8. We ( talk)______________ when someone knocked the door., giúp em giải bài này ạ, em cảm ơn thầy cô và các bạn nhiều.