When a progressive tense is used in the independent clause, the dependent clause typically uses the tense.
simple past
simple present
progressive past
progressive prersent

Sparta faces threats from without and within the city-state who posed these threats.

What does the quote describe? “the closeness of the place, and the heat of the climate, added to the number in the ship, which was so crowded that each had scarcely room to turn himself, almost suffocated us….the shrieks of the women, and the groans of the dying, rendered the whole a scene of horror almost inconceivable.”

Which of these was an accomplishment of the han dynasty? the invention of the seismograph finding a water passage to europe the invention of the ballpoint pen the invention of the abacus