In most contexts, use who, whom, or whose to refer to persons, and use which or that to refer to animals or things.
Edit the following sentences to correct errors in pronoun reference. In some cases, you will need to decide on an antecedent that the pronoun might logically refer to. Possible revisions appear in the back of the book.
They say that engineering students should have hands-on experience with dismantling and reassembling machines.
She had decorated her living room with posters from chamber music festivals. This led her date to believe that she was interested in classical music. Actually she preferred rock.
The high school principal congratulated the seniors that were graduating later that day.
Marianne told Jenny that she was worried about her mother’s illness.
Though Lewis cried for several minutes after scraping his knee, eventually it subsided.