Hange the verb to indicate that it was in progress at a time in the past using the correct form of estar in blank 1 and correct form of action verb in blank 2. ellos no pagan por el boleto.

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.