The train at the present speed until it reaches Beijing at about 6 :30 am.A. wentB. has g

问题补充：

The train at the present speed until it reaches Beijing at about 6 :30 am.

A. went

B. has gone

C. goes

D. will be going

答案：

A. went

B. has gone

C. goes

(答案→)D. will be going

解析：句意：火车将以现在这个速度行驶，直到大约九点钟到达山脚为止。until引导的句子用了一般现在时，说明主句要用将来时态，再根据时间状语at the present，所以用将来进行时。