这个看搭配的。比如 I went to the airport at which I saw him off. 就是看你短语的搭配 at the airport 就用at which , in the classroom 就用in which 如此类推
第2个回答 2012-07-31
介词+which引导的定语从句,介词的选择取决于短语结构和句子意思。追问
额...那怎么选介词呢?就比如这个句子 As a coach,he knows clearly about the direction ——his team should develop。 A to which,B in which,C on which,D for which 这道题选B 是为什么呢?