题目内容

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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