For Questions 16 through 20, select the two answer choices that, when used to complete the sentence, fit the meaning of the sentence as a whole and produce completed sentences that are alike in meaning.
He entered his supervisor’s office with an ______ sense of doom; his misdeeds at the office party would certainly cause him to be fireD、 A、elemental B、impractical C、inadvertent D、inexorable E、assiduous F. unerring