I don't really understood your question, but i guess that you want to change the sentence to past progressive, in that case it will be like this:
Nosotros estábamos subiendo a la habitación.
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Argentina está en Centroamérica
True or <u>false</u>
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Argentina is in Central America
I thINk it's false im not 100% sure
El traje de baño is what you need for the beach or pool