— will you e back home from vacation?
—In two weeks.
A. How often
B. How soon
C. How much
D. How long
网友回答
A. How often
(答案→)B. How soon
C. How much
D. How long
解析：特殊疑问词辨析。How often表示对频率的提问；how soon是对将来时的提问；how much是对数量的提问；how long是对一段时间的提问。根据回答in two weeks，说明是对将来时的提问，故B正确。