—Could you tell me?—By underground.A. how did you come hereB. how you came hereC. when did

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。