Problem: Susan knew that Ann 's son had been in a car accident, because *she* told her about it.

Do "she" and "Susan" mean the same thing?

Answer: no


Problem: Since it was raining, I carried the newspaper over my backpack to keep *it* dry.

Do "it" and "the newspaper" mean the same thing?

Answer: no


Problem: We had hoped to place copies of our newsletter on all the chairs in the auditorium, but there were simply not enough of *them* .

Do "them" and "chairs" mean the same thing?

Answer:
no