The order is a,c,b,d! hope this helps
Mi padre despierta a las siete.
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
Answer: ser>to be
nosotros> U.S
Explanation: el resto de este lado es, espero que esto ayude o simplemente puede buscarlo y el otro es EE. UU.--------the rest on this side it to be i hope this helps or you could just look it up and the other one is U.S