问题补充:
My father has worked there .
A. since five years
B. since 1990
C. for five years ago
D. five years
答案:
A. since five years
(答案→)B. since 1990
C. for five years ago
D. five years
解析:一般能和现在完成时连用的时间状语为since+一段时间 ago 或for+一段时间,或since+一般过去时态的句子,或since+过去时间,故选B,符合题意。