摘要： A. as B. since C. when D. before 答案:C 指导:when引导定语从句.修饰前面的名词day.本身作状语.判断对了句子结构.便能很容易排除其他选项. 其他三个选项中.只有as可以引导定语从句.但往往当"正像 或“跟--一样 讲.
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