Problem: I used an old rag to clean the knife , and then I put *it* in the drawer.

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

Problem: John hired Bill to take care of *him* .

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

Problem: The sack of potatoes had been placed above the bag of flour , so *it* had to be moved first.

Are "it" and "The sack of potatoes" the same?
Answer: yes

Problem: Jane knocked on Susan 's door but *she* did not get an answer.

Are "she" and "Jane" the same?
Answer:
yes