Thanks for your help , I couldn’t finish the work in time .
A. with which
B. under which
C. without which
D. for which
网友回答
A. with which
B. under which
(答案→)C. without which
D. for which
解析：考查定语从句中关系代词前面的介词。定语从句中关系代词前面的介词有三种来源：先行词的搭配；定语从句中词汇到的搭配；句子上下文的意思；本句是根据上下文的意思判读使用without。句意：谢谢你的帮助，要是没有你的帮助，我就不能及时完成工作。Which知道help作为without的宾语。故C正确。