-What will you do on May Day?-We have a___holday,so we'll go for a trip.A.three days B.three-days C.three-day选什么?
问题描述：
-What will you do on May Day?-We have a___holday,so we'll go for a trip.A.three days B.three-days C.three-day选什么?
答
选C注意只要看到两词间有横杠的，那么这里的名词不能用复数。因为它代表一个形容词已通知提问者对您的回答进行评价，请稍等