问题补充：
Could you please tell me ？
A. when the train will arrive
B. when the train arrived
C. when did the train arrive
D. when does the train arrives
答案：
(答案→)A. when the train will arrive
B. when the train arrived
C. when did the train arrive
D. when does the train arrives
解析：英语宾语从句中一般为陈述语序。句意：你能告诉我火车什么时候到达吗？结合主句内容，可知从句中描述的是将要发生的动作，故用一般将来时态，选A。
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