This is the book I bought yesterday I spent 8 yuan .A. on which B. for which C. in which

问题补充：

This is the book I bought yesterday , I spent 8 yuan .

A. on which

B. for which

C. in which

D. at which

答案：

(答案→)A. on which

B. for which

C. in which

D. at which

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