I paid a fine of 200yuan for speeding. If only I _________ the traffic rules!
A．had respectedB．respected
C．would have respected D．could respect
A

試題分析：對過去情況的虛擬，條件句中用過去完成時，主句用“would/should/might/could + have + 過去分詞”，故選A。
點評：解答這類題目，首先需要準確判斷出是真實條件句還是虛擬條件句。真實條件句所表示的假設(shè)是有可能實現(xiàn)的，而虛擬條件句所表示的假設(shè)是不可能或不大可能發(fā)生的。
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