formal – adj. suitable for serious or official speech and writing
apply – v. to ask formally for something (such as a job, admission to a school, a loan, etc.) usually in writing
hire – v. to give work or a job to (someone) in exchange for wages or a salary
indeed – adv. without any question — used to stress the truth of a statement
substitute – n. a person or thing that takes the place of someone or something else