核心问题
The village is far away from here indeed. It's ____ walk. A. a four hour B. a four hour's C. a four-hours D. a four hours' (上海高考,04 春 -27) 答案为 D。能否选 A 呢？
词典解答
上面的试题有重大的失误:选项 A 也是完全正确的,即数词 + 单数名词作定语,也是正确的格式,见 hour 。
plurals unmarked(无标记复数) 见 people, police, cattle
poem/poetry 见 weapon/weaponry