---Jack, have you been away from your hometown?
---Since the end of last February.
A. how long
B. how soon
C. how far
D. how often
网友回答
(答案→)A. how long
B. how soon
C. how far
D. how often
解析：考查情景交际与现在完成时。“杰克，你离开家乡多久了？”“自从去年二月底。”对一段时间提问，用how long；how soon是对将来提问；how far对距离提问；how often对频率提问。故选A。