Someone who rules with complete power

Write a sentence using a gerund phrase with a pronoun subject.

How much time has elapsed from the very beginning of "the memior of the conquistador bernal diaz del castillo" to the end? a. castillo's whole life b. a quarter of an hour c. a few weeks d. a decade

The voussoirs rest on the centering until the keystone is wedged into place. at that point, the centering can be dismantled. what does the word dismantled mean? a. to take apart b. to put together c. to cover d. to lift up