第30题: [单项选择]We didn't know his telephone number, otherwise we ______ him. A. would telephone B. would have telephoned C. had telephoned D. must have telephoned 参考答案:B 答案解析:本题为虚拟语气题。在虚拟条件句中,如果与过去事实相反,主句常用“情态动词 would,could,might加上have done”这种形式。本题为隐含条件句,与过去事实相反。本句大意为;我们不知他的