She opened the handbag but couldn’t find the money she was to buy dog food.A. for which B.

问题补充：

She opened the handbag but couldn’t find the money she was to buy dog food.

A. for which

B. with which

C. by that

D. of that

答案：

A. for which

(答案→)B. with which

C. by that

D. of that

解析：考查定语从句。在定语从句中关系动词that是不能放在介词的后面的，排除CD项。定语从句在的一些搭配的介词可以提前到关系代词的前面。句意：她打开手提包，但是却找不到她要用来给狗买食物的钱。句子的介词with表示“用”；故B正确。