费德勒vs索克:英语初一的

来源:百度文库 编辑:中科新闻网 时间:2024/05/14 06:57:34
they spent ___________ vacation.
1.three day 2.a three-day 3.a three-days 4.three-day
速度,别答错哦
why?用中文!

a three-day =three days'

2