—will the foreign students be back from Qufu?—In two days.A. How longB. How soonC. How man

问题补充：

—will the foreign students be back from Qufu?

—In two days.

A. How long

B. How soon

C. How many

D. How far

答案：

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。