i was ___when you called me.i had my hair cutA in the hairdresser'sB at a hairdresserC at the hairdresser'sD in a hairdresser为什么?顺道问问 at on in有什么区别
问题描述：
i was ___when you called me.i had my hair cut
A in the hairdresser's
B at a hairdresser
C at the hairdresser's
D in a hairdresser
为什么?顺道问问 at on in有什么区别
答
“在某人（的某地）处”固定用at,
at (the) 某人's
就是这样了,固定搭配