Robert will go back to the USA for ____holiday.A.two-months B.a two-month C.two-month
问题描述：
Robert will go back to the USA for ____holiday.A.two-months B.a two-month C.two-month
D.a two-months
答
B.a two-month请问为什么选B呀，我不明白请给我讲讲行么中间有连字符时，不用复数，相当于一个形容词