用所给词的适当形式填空。 1. He __________(work) in that hospital four years ago. 2. Why __________ your brother __________(cry) last night? 3. I __________(see) him yesterday. 4. He __________(come) to school at 6 o’clock this morning. 5. The boy __________(have) a bad cold yesterday. 6. When __________ you __________(buy) that house? 7. He __________(tell) a story to his daughter yesterday. 8. __________ you __________(try) to call me last night? 9. What __________you __________(buy) in the shop? 10. I __________(buy) a coat just now. 11. She __________(paint) the wall last month. 12. My mother __________(be) a worker 20 years ago.