分类：教育/科学-外语学习
问题：一道英语题单项选择,Themarketisn'tfarhere. 
单项选择,The  isn't far here .It's only _______ bike ride.A.half an hours'  B.half an hour's C.half an hour    D.an hour and a half并请给出选与不选的理由及每个选项的意思.
回答：The market isn't far here .It's only _______ 
bike ride. 
 B.half an hour's 

此处需要所有格，并且half an hour's 是单数

所以's，而不是s'