Is there anything I can do for you?A. whichB. whoC. thatD. whom

问题补充：

Is there anything I can do for you?

A. which

B. who

C. that

D. whom

答案：

A. which

B. who

(答案→)C. that

D. whom

解析：考查定语从句。当先行词是指物的不定代词的时候，且定语从句中使用关系代词，则使用that.本题先行词是不定代词anything，且后面的定语从句do后面缺宾语，则使用关系代词.故C正确。