问题补充：
— Excuse me, could you tell me to fly to Guilin?
— About two hours.
A. how soon does it take
B. how long it takes
C. how long did it take
D. how soon it took
答案：
A. how soon does it take
(答案→)B. how long it takes
C. how long did it take
D. how soon it took
解析：本题考查的特殊疑问句作为宾语从句，要用陈述句语序，故选答案为B
