I have worked in this factory I came here in 2001.A. from B. for C. since

问题补充：

I have worked in this factory I came here in 2001.

A. from B. for C. since

答案：

解析：句意：我自从2001年来到这里就在这家工厂上班。句中用的是现在完成时，后面可接for或since引导的时间状语，for后面接一段时间，例如for two years;而since后面接时间点，如本题中的came here这个时间点；故选C。