If I _________ her e-mail address, I _________ the longdistance call．A.knew；wouldB.had known; would have madeC.had known；wouldn’t have madeD.would know；had made
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C解析题意是“如果我知道她的e-mail邮址，我将不会打那个长途电话”。此题是与过去情况有关的虚拟语气。条件从句用过去完成时态，主句用would have done结构，根据句意此处主句用否定句式。