Fill in correct articles. 1. when my dad was in the hospital, someone took him fir a doctor by _ mistake. 2. he bought a new house and has been in _ debt since that time. 3. perhaps the mosr difficult thing for him to do was to keep _ house. 4. children were asked to learn the poem by _heart. 5. the minerals have been on_strike for two week. 6.there was nothing in _ common between them. 7. the product on_ sale are with expired dates. 8. he got in _ fury having learn about their betrayal. 9. all of _ sudden the sky became dark and the storm began. 10. almost a year ago they lost _ contact with their brother. 11. my father has been in _ change of the factory for two months. 12. don't be in_ hurry, they can wait for you.