— Could you tell me ? — Certainly. In half an hour.A. when will the high speed train arriv

问题补充：

— Could you tell me ?

— Certainly. In half an hour.

A. when will the high speed train arrive

B. when the high speed train will arrive

C. when would the high speed train arrive

D. when the high speed train would arrive

答案：

A. when will the high speed train arrive

(答案→)B. when the high speed train will arrive

C. when would the high speed train arrive

D. when the high speed train would arrive

解析：句意：你能告诉我高铁什么时候到达吗？此题是考查宾语从句，宾语从句的语序要用陈述语序，此题主句是一般现在时态，所以从句可根据需要选择时态，根据答语（半小时之后）所以用将来时态，故选B。