His father has worked in this factory he came here in 1985.A. for B. since C.when

问题补充：

His father has worked in this factory he came here in 1985.

A. for B. since C.when

答案：

解析：：此题考查现在完成时的时间状语。常用for和since来引导。For+段时间或since+点时间，since+从句。他爸爸从1985年到这里以来一直在这儿工作。