Ustedes estudian en la biblioteca is the correct answer.
Spanish has verb suffixes for each pronoun, which is something English only has for third person singular (-s, or -es). So, this is how to conjugate the verb estudirar (=to study):
1. yo estudio 1. nosotros estudiamos
2. tu estudias 2. vosotros estudiais
3. el/ella/Usted estudia 3. ellos/ellas/Ustedes estudian
Ellos usaban una pulsera y una corbata
Answer:
Give me a piece of paper please, I need to get my snot out and I have nothing to do with you give me paper please !! ??
This is from google translate but I think you copied the question wrong because this makes no sense.
Mis primos y yo quisimos una carta de nuestra abuela en Boston hoy en la manana.
Mis hermanos y yo tuvimos miedo de no volver a ver a nuestros padres.
Mi abuelo y yo no quisimos regresar a nuestro pais natal.
Mi mama y yo siempre queriamos tener nuestra propia casa.