Could you tell me?- Certainly. In half an hour.A. when will the train to Chengdu le

问题补充：

--- Could you tell me?

--- Certainly. In half an hour.

A. when will the train to Chengdu leave

B. when the train to Chengdu left

C. when would the train to Chengdu leave

D. when the train to Chengdu will leave

答案：

A. when will the train to Chengdu leave

B. when the train to Chengdu left

C. when would the train to Chengdu leave

(答案→)D. when the train to Chengdu will leave

解析：句意：你能告诉我到成都的火车什么时候离开吗？当然可以，半小时候。句中所缺的是宾语从句，要用陈述语序，而且根据题意要用一般将来时，故选D。