问题补充:
——How long have you worked here?
——.
A. Since five years
B. Since five years ago
C. Five years ago
D. For five years ago
答案:
A. Since five years
(答案→)B. Since five years ago
C. Five years ago
D. For five years ago
解析:how long 要与一段时间连用,故其回答应该用for +一段时间来回答,或since +一段时间ago,故选答案为B