问题补充：
---Could you tell me ?
---Of course, last night.
A. when you reached China
B. when did you reach China
C. how you came to China
D. how did you come to China
答案：
(答案→)A. when you reached China
B. when did you reach China
C. how you came to China
D. how did you come to China
解析：此题考查宾语从句的语序问题，因为宾语从句的语序必须是陈述句语序排除BD，根据句意“Last night”的提示，排除C故选A
