—Have you heard about the recent election?—Sure, it the only thing on the news over the l

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A. would be
B. is
(答案→)C. has been
D. had been
解析：考查动词时态：句意：--你听说最近的选举了吗？--当然，这是最近三天报纸上的唯一的事情。从上文have you heard判断是现在范畴的时态，for the last three days是现在完成时的标志词，故用现在完成时。选择C。