第5题: [单项选择]______, he could not cover the whole distance in fifteen minutes. A. Fast as he can run B. As he can run fast C. if he can run fast D. Since he ran fast 参考答案:A 答案解析:本句为语法结构题。as引导让步状语从句时句子要发生倒装,且根据句意我们应选择一个让步状语从句。本句大意为:尽管他能跑得很快,他也不能在1.5分钟之内跑完,全程。