Problem: Jim yelled at Kevin because *he* was so upset.

Are "he" and "Jim" the same?
Answer: yes

Problem: Sam's drawing was hung just above Tina's and *it* did look much better with another one below it.

Are "it" and "Sam's drawing" the same?
Answer: yes

Problem: Mark told Pete many lies about himself, which Pete included in his book. *He* should have been more truthful.

Are "He" and "Mark" the same?
Answer: yes

Problem: The sun was covered by a thick cloud all morning, but luckily, by the time the picnic started, *it* was gone.

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