For that reason we could finish our homework.
_______ esa razón pudimos terminar nuestra tarea. 

The bus goes 80 kilometers per hour.
El bus va a 80 kilómetros _____ hora.

I bought that book for José.
Compré ese libro ______ José.

I get paid three times a month.
Me pagan tres veces ______ mes.

I'll give you 100 dollars for your pants.
Te daré 100 dólares ______ tus pantalones.

The stone house was built by the Incas.
La casa de piedra fue construida ______ los incas.

I arrived late because of the traffic.
Llegué tarde ______ el tráfico.

A house costs at least thirty thousand dollars.
Una casa cuesta ______ lo menos treinta mil dólares.

He will do it by Monday.
Lo hará ______ el lunes.

We go to the beach for the purpose of swimming.
Vamos a la playa _______ nadar.

Do you have something for me?
¿Tienes algo ______ mí?

For that reason we could finish our homework. _______ esa razón pudimos terminar nuestra tarea.