— 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：你能告诉我高速列车什么时候到吗？当然可以，半小时后。Tell后接的是宾语从句，用陈述语序，并用will表将来，故选B。