Four thousand kilometers not a short distance.A. isB. areC. wasD. were

问题补充：

Four thousand kilometers not a short distance.

A. is

B. are

C. was

D. were

答案：

(答案→)A. is

B. are

C. was

D. were

解析： 表示时间、金钱、距离、价格等名词后加-s作主语时，视为一个整体，故谓语动词用单数形式。句意：四千千米不是一段短的距离。故选A。