Mary failed the driving test again．If she harder, she the test easily．
A. practiced; would pass
B. had practiced; would pass
C. had practiced; would have passed
D. should practice; should have passed
网友回答
A. practiced; would pass
B. had practiced; would pass
(答案→)C. had practiced; would have passed
D. should practice; should have passed
解析：句意：玛丽又没有通过驾驶考试。要是她多加练习，她就能很容易地通过考试。表示与过去事实相反时，if从句谓语用“had＋过去分词”，主句谓语用“would＋have＋过去分词”。所以选C。