Question

My father has worked there ___________

1. A.
   since five year
2. B.
   since 1990
3. C.
   for five years ago
4. D.
   five years

Answer 1

B
现在完成时的时间状语，since+时间点；for+时间段。Since 1990自1990年以来表示时间段故选B。