This scentence translates to:
in the store you pay at _________.
the answer is la caja which means the cash register.
Hope this helps :-)
God Bless you!
The answer would be the "Breastroke" is the one you used the most meaning that when you swim you use your arms and legs.
La muchacha dibuja en la class de arte.
Mochila cartel los las the verb estar en.