Simone
three days,three-days,three-days'和three-day
We'll have a （ ）holiday.What are you planning to do?
A.three days
B.three-days
C.three-days'
D.three-day
一定要告诉我理由,光一个答案没用
选D吧?
three— day + time 三天的时间
three days + time 没有这种用法,可以说 three days 表示三天
three days' + time 三天的时间 等于 three-day time
有连词符的情况下,名词一律用单数,没有连字符的情况下,如果名词可数,一律变复数.
