Problem: Bob paid for Charlie 's college education, but now Charlie acts as though it never happened. *He* is very ungrateful.

Are "He" and "Bob" the same?
Answer: no

Problem: The table won't fit through the doorway because *it* is too narrow.

Are "it" and "The table" the same?
Answer: no

Problem: After I saw Bill catching flies and pulling off their wings, I boxed his ears. I showed the master the flies, some crushed and some crawling about helpless, and I showed him the wings on the window sill. I never saw *him* so angry before; but as Bill was still howling and whining, like the coward that he was, he did not give him any more punishment of that kind, but set him up on a stool for the rest of the afternoon, and said that he should not go out to play for that week.

Are "him" and "the master" the same?
Answer: yes

Problem: I poured water from the bottle into the cup until *it* was full.

Are "it" and "the cup" the same?
Answer:
yes