It is only__walk,so you can get here on foot.

问题描述:

It is only__walk,so you can get here on foot.
选项A.HALF AN HOUR B.HALF AN HOUR′S
C.HALF AN HOURS D.HALF AN HOURS′

答案:B
翻译:走路只有半小时的路程,因此你可以步行去那里.
half an hour 表示“半小时”,这里要用名词的所有格形式,在后面加上’s,用来修饰后面的名词walk.