考点四：基数词+名词”构成的 合成形容词
基数词+名词(+形容词)”构成合成形容词时，用连字号-”连接，连字号后的这个名词不能用复数形式。例如：a 7-day holiday为期七天的假期”，a five-year-old boy一个五岁的男孩”。
中考链接
1.—Haveyou heard about Zhangjiajie GlassFootbridge?
— Ofcourse,it’sbuiltover a ______canyon intheZhangjiajieNationalForestPark.
A. 300-meter-deep
B. 300-meters-deep
C. 300meterdeep
D. 300-metersdeep
2. It is five years since we began to enjoy a ______ spring holiday each year.
A. ten-day B. ten day
C. ten day’s D. ten days
【答案】
1.A 2. A
