【题目】Mandela was generous with his time, Elias was grateful.
A. to which B. for which
C. which D. to whom
在线课程【答案】A
【解析】考查定语从句。句意：Mandela不吝惜自己的时间，Elias对此非常感激。“ Elias was grateful”是定语从句，修饰Mandela was generous with his time这个句子，be grateful for意为“对……感激”，引导词在从句中做介词for的宾语，故要用关系代词which。综上，B选项正确。