Basically they’re the same.
The only difference is lengua can mean tongue as well.
Answer:
Hemos estudiado por más de tres horas.
C:miras
Since the person being described is Usted, this would mean that it's Miras because this would accurately translate to
Usted miras la televisión
Answer:
gives the answer key please
A nosotros no nos importa el itinerario.
answer is nos