For Questions 16 through 20, select the {{U}}two{{/U}} 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.

填空题 Joanna's ______ lack of enthusiasm about the job made the interviewer extremely apprehensive to hire her; the company was searching for motivated employees who enjoyed what they did. A. covert B. manifest C. furtive D. feigned E. deceptive F. obvious

填空题 The American Civil War began after the Confederate States of America seceded from the Union, in essence dividing the United States into two ______ countries. A. concordant B. allied C. distinct D. discrete E. united F. banded

填空题 Despite the capricious impulses that often impelled him to action in his social life, he was actually quite ______ when it came to making business decisions. A. logical B. garrulous C. pragmatic D. guileless E. reclusive F. pretentious

填空题 The fear inspired by the media's coverage of unprovoked shark attacks is ______; there are actually more fatalities each year from lightning strikes than from shark attacks. A. pompous B. exaggerated C. candid D. subdued E. excessive F. inevitable

填空题 Agriculturists have traditionally considered crop rotation to be ______; it helps to preserve soil nutrients, control disease, and deter weed growth. A. aesthetic B. didactic C. pedantic D. incidental E. crucial F. indispensable