Problem: When Tommy dropped his ice cream, Timmy giggled, so father gave *him* a stern look.

Do "him" and "Timmy" mean the same thing?

Answer: yes

Problem: The cat was lying by the mouse hole waiting for the mouse , but *it* was too impatient.

Do "it" and "The cat" mean the same thing?

Answer: yes

Problem: Jane knocked on the door, and Susan answered it. *She* invited her to come in.

Do "She" and "Jane" mean the same thing?

Answer:
no