Я работаю (вопрос и падеж)в артели. у(вопроси падеж) корней лохматой(вопрос и падеж) ели. Помогите ответитьь на вопрос и указать падеж.Спасибо

1. I am writing2. I was writing3. is sleeping4. was sleeping5. are not doing6. were not doing7. Are you eating ice-cream now?8. Were you eating ice-cream...?9. What is your father doing now?10. What was your father doing...?11. Why is she crying now?12. Why was she crying...?13. She was reading...14. is not reading15. is going16. What are you doing now? - I am drinking tea.17. Were you drinking tea at this time yesterday? - No, I was not drinking tea at this time yesterday, I was eating a banana.18. was reding, is reading19. is playing20. was shining, were singing

Где?Чего? ( родительный);Чего? ( родительный)

я (что делаю?) работаю и.п в артели.у(чего?) корней р.п лохматой(какой?) ели р.п.