Teacher: You will see a sentence and a given pronoun. Answer with the word in the sentence to which the pronoun is referring.
Teacher: Now, understand the problem? If you are still confused, see the following example:
this book introduced shakespeare to ovid; it was a fine selection of his writing.
Solution: his writing
Reason: in this statement the pronoun is his and his writing is referring to the quote in the sentence using the pronoun

Now, solve this instance: text: john promised bill to leave, so an hour later he left.; pronoun: he
Student:
john