How long_____(spend)in building this bridge last year.

题目

How long_____(spend)in building this bridge last year.
填has been spent.
本人理由:因为是"how long"提问,所以用现在完成时,因为主语是this bridge,所以用被动语态,所以填写has been spent.

答案

不对.
不是how long开头就是用完成时的.
这里有last year 的时间概念,而且这桥应该是已经造好了,现在完成时是到现在为止还没完成.
所以,应为 was spent