Which word or phrase best completes this sentence? en las vacaciones con mi amiga laura nos bañábamos en la piscina de marcos. todo el tiempo anoche hace dos días ayer

En las vacaciones con mi amiga Laura nos bañábamos todo el tiempo en la piscina de Marcos.

This is the correct option because this sentence stands for the imperfect. So imperfect tenses talk about action that occurred regularly or frequently or that were in progress in a moment in the past. So todo el tiempo means all the time and this tells us that the sentence were in progress in a moment in the past. The other options talk about a specific moment in the past. Finally:

En las vacaciones con mi amiga Laura nos bañábamos todo el tiempo en la piscina de Marcos.

ancient india is often called the harappan civilization because one of the ancient cities was called harappa. harappa was just one of 1500 cities in the indus river valley. another well-known city is called mohenjo-daro. historians estimate ancient india to be the biggest of all four early civilizations.