— will the foreign students be back from Qufu?
—In two days.
A. How long
B. How soon
C. How many
D. How far
网友回答
A. How long
(答案→)B. How soon
C. How many
D. How far
解析：根据答语In two days“两天后”可知，应该用How soon“多久”来提问。How long“多长时间”，一般用for或since来回答；How many“多少”是提问数量的；How far“多远”是提问距离的。所以本题选B。