Chia ®éng tõ trong ngoÆc ë th× thÝch hîp 1. Columbus . (discover) America more than 400 years ago. 2. It .(rain) very hard now. 3. The sun .(warm) the air and .(give) us light. 4. They .(come) here a month ago. 5. Look! A man .(run) after the train. 6. We .(go) to the mountains last Sunday. 7. They .(come) here a month ago. 8. Albert Einstein .(die) on 18, 1955. 9. I .(have) lunch with Dong yesterday. 10.They .(come) to see me this morning. 11. She .(go) to school everyday. 12.Bad students never .(work) hard. 13.It often .(rain) in the summer. It .(rain) now. 14.The teacher always .(point) at the black – board when he .(want) to explain something. 15.Mother .(cook) some food in the kitchen at the moment, she always .(cook) in the morning. 16.I always .(meet) him on the corner of this street. 17.Where You .(go) now? – I .(go) to the theater. 18.He .(not do) morning exercises regularly. 19 . he .(do) morning exercises now? 20.Nam .(buy) several records last week. 21.What . you .(do) yesterday? 22.They .(finish) their dinner half an hour ago. 23.Water .(boil) at 100 degrees centigrade. 24.The factory .(begin) operation last year. 25. . Chia ®éng tõ trong ngoÆc ë th× thÝch hîp 1. Columbus . (discover)