请教个英语单复数的问题
问题描述：
请教个英语单复数的问题
Jim has been away for 25 days.I miss him very much,you know,25 days ___ short.
这里应该填 isn't 还是 aren't
答
Jim has been away for 25 days.I miss him very much,you know,25 days isn't short.
用单数,这边的twenty -five days看成是一个整体,用单数