问题补充：
—Excuse me, could you tell me ?
— Wait a moment. It is coming in ten minutes.
A. where the next train will arrive
B. if the next train will arrive
C. how soon the next train will arrive
D. how often the next train will arrive
答案：
A. where the next train will arrive
B. if the next train will arrive
(答案→)C. how soon the next train will arrive
D. how often the next train will arrive
解析：本句考查的是特殊疑问句作为宾语从句要用陈述句语序，故选答案为C
