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18.Gov.David Paterson______ to account for his actions.If he can show that he did no wrong,he must do so.If not,he should resign.(  )
A.has failedB.had failedC.is failingD.failed

分析 David Paterson州长没有对自己的行为作出解释.如果他能证明自己没有错,他必须得这样做.如果不能,他就应该辞职.

解答 答案:A
此处表示过去的动作"fail  to account for his actions"(没有对自己的行为作出解释)对现在造成的影响或产生的结果,即:要么证明自己没有错;要么辞职;所以这里应使用现在完成时;故选A.

点评 本题考查了现在完成时强调"影响性"的用法;做本题时,首先需要了解现在完成时除了强调动作的持续性以外,它还强调过去的动作对现在产生的影响以及造成的结果;例如:I have already seen the film.我已经看过这部电影了.(对现在的影响是:我知道电影的内容);I have lost my key.我把钥匙弄丢了.(造成的结果是:我进不了门了.)

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