He vows to forgive Gertrude for what she has done in marrying Claudius. He vows to apologize to Ophelia for the way he has treated her.
Based on the given sentence above, the error that I can find is the incorrect use of the pronoun "their". Looking at the sentence, the subject is "One of your students", this means only one, and not all the students. Therefore, this should take a singular pronoun. So the correct sentence would be "One of your students left his or her book on the table." So the answer for this would be option A. Hope this helps.
Travel agency is a private retailer or public service that provides travel and tourismrelated services to the public on behalf of suppliers such as activities, airlines, car rentals, cruise lines, hotels, railways, travel insurance, and package tours. In addition to dealing with ordinary tourists, most travel agencies have a separate department devoted to making travel arrangements for business travelers; some travel agencies specialize in commercial and business travel only. There are also travel agencies that serve as general sales agents for foreign travel companies, allowing them to have offices in countriesother than where their headquarters are located.