Problem: If "As Ollie carried Tommy up the long winding steps, his legs ached.", is "Tommy's legs ached." correct?

Answer: no


Problem: If "The table won't fit through the doorway because it is too narrow.", is "The doorway is too narrow." correct?

Answer: yes


Problem: If "The Dakota prairie lay so warm and bright under the shining sun that it did not seem possible that it had ever been swept by the winds and snows of that hard winter.", is "It did not seem possible that the prairie had ever been swept by the winds and snows of that hard winter." correct?

Answer:
yes