Mike lost the pen he paid 10 yuan.A. to whichB. whichC. for thatD. for which

问题补充：

Mike lost the pen he paid 10 yuan.

A. to which

B. which

C. for that

D. for which

答案：

A. to which

B. which

C. for that

(答案→)D. for which

解析：考查定语从句中介词+关系代词。定语从句中的介词+关系代词=关系副词。本题的介词for来自于固定短语pay for…；which指代the pen作为for的宾语。句意：Mike把他花了10元钱购买的笔弄丢了。