问题补充:
—Could you tell me?
—By underground.
A. how did you come here
B. how you came here
C. when did you come here
D. when you came here
答案:
A. how did you come here
(答案→)B. how you came here
C. when did you come here
D. when you came here
解析:本题tell后跟的是一个宾语从句,应该用正常顺序,故不选AC,本题的回答语表示的是乘交通工具的方式,用how来提问,故本题选B。