Which principal part of the verb is used in the following sentence?

the referee rang the bell to end the game.

a.
past

b.
present

c.
past participle

d.
present participle

Explain the effect of the rhetorical questins for the below paragraph."i pinched myself: was i still alive? was i awake? how was it possible that men, women, and children were beiing burned and that the world kept silent? no. all this could not be real. a nightmare soon i would wake up with a start, my heart pounding, and find that i waas back in the room of my childhood, with my "