Question

Tomás no va a volver en tren. Compró un billete ____.

a.
en segunda
c.
libre
b.
de ida y vuelta
d.
sencillo

Answer 1

D. Sencillo
Compro un billete sencillo.

Answer 2

D) sencillo ( one-way ticket)

I've taken Spanish for Spanish Speakers 2 and AP Spanish Language & Culture so I hope I was able to help you!