we usually have a ___every year.A.two manths vacation B.two-month vacationC.two months vacations
问题描述：
we usually have a ___every year.A.two manths vacation B.two-month vacationC.two months vacations
D.two months'vacations
答
选B,two-month作adj.为什么“two-month"作形容词？是有连字符的都做形容词吗？一般是的，像“a one-way road”。有时加连字符表示几分之几