Which sentence is an example of formal language? A. That car is so totally sweet, and you should see how fast it goes!
B. You would love to drive a Bugatti Veyron, it's fast and really comfy
too.
C. Bugatti Veyrons are really fast, and I would love to have one of my
own.
D. The Bugatti Veyron is the fastest and most luxurious car in the
world.

which speech are you talking about?

the answer is b. the tomb is underground and dark, and its opening is covered by a heavy grate.

basic principle: a pronoun usually refers to something earlier in the text (its antecedent) and must agree in number — singular/plural — with the thing to which it refers. the indefinite pronouns anyone, anybody, everyone, everybody, someone, somebody, no one, and nobody are always singular.