1) Yo no le he escrito ningún correo electrónico a nadie
2) yo nunca me conecto al internet
3) no quiero comprar nada para mi computadora
4) a mi no me gustan las cámaras
5) no tengo ningún disco compacto para mi computadora
Answer:
Earrings would be aretes.
B) they shake each other's hand
The verb in this sentence,"se dan", comes from "darse", which is a reciprocal verb (verbo recíproco) and these verbs always talk about something that the speakers are mutually doing, so the other options wouldn't be correct because: 1) They aren't referring to the 3rd person of plural, 2) They aren't doing a reciprocated action.
Hope this helped you :)