Read the excerpt from “the gift of the magi” by o. henry. which sentence uses an auxiliary verb to express certainty?

out of his trance jim seemed quickly to wake. he enfolded his della. for ten seconds let us regard with discreet scrutiny some inconsequential object in the other direction. eight dollars a week or a million a year - what is the difference? a mathematician or a wit would give you the wrong answer. the magi brought valuable gifts, but that was not among them. this dark assertion will be illuminated later on.

jim drew a package from his overcoat pocket and threw it upon the table.

"don't make any mistake, dell," he said, "about me. i don't think there's anything in the way of a haircut or a shave or a shampoo that could make me like my girl any less. but if you'll unwrap that package you may see why you had me going a while at first."