. The train for twenty minutes.A. leftB. has leftC. is leavingD. has been away

问题补充：

. The train for twenty minutes.

A. left

B. has left

C. is leaving

D. has been away

答案：

A. left

B. has left

C. is leaving

(答案→)D. has been away

解析：此题考查延续性动词和段时间状语搭配。For + 时间段， Leave 离开 为短暂动词，不能和时间段连用， 所以用away, have been away 表示状态的延续。