ПОМОГИТЕ С АНГЛИЙСКИМ,ПОЖАЛУЙСТА Воткните определенный либо неопределенный артикль, где это

ПОМОГИТЕ С АНГЛИЙСКИМ,ПОЖАЛУЙСТА
Воткните определенный либо неопределенный артикль, где это нужно.
1. He is doctor already. 2. Is your mother at home, Alex? No, mother is not at home. 3. mother is worker and father is doctor. 4. Smiths are our neighbours. They are six in family: grandfather, grandmother, father, mother, son and daughter. 5. Pacific Ocean is deepest in world. 6. Alps are most beautiful mountains in Europe. 7. USA is country of immigrants. 8. Some pupils go to school. school building is quite modern. 9. I want to read some English book in original. 10. Thames and Severn are main rivers in Great Britain. 11. In August 2000 Queen Mother celebrated her 100-th anniversary. 12. This is most famous play by Oscar Wilde.
13. During breakfast I usually have cup of coffee and sandwich. 14. On Sunday I always go to dinner in restaurant. 15. New York Times and Figaro are well-known newspapers all over world. 16. time is money. 17. I wish you luck. 18. He is in hospital. hospital is in south part of town. 19. You neednt leave country for town.