Was there options to put in there or did you just have to come up with one ?
Answer:
Use tú for informal situations such as with a friend, children, young people, people you know very well. Use usted (Ud.) for formal situations such as in a job interview, in a bank, with elderly people, with someone you don't know or you have just met
Explanation:
Answer
Sr. González, no sea tan impaciente, por favor.
Spymore
The singular form is una libreta