为什么at the doctor‘s中有一个the,而at Mike’s中没有the,急

at the doctor's造句 at the doctor、at the doctor’s 、in the doctor 、 in the doctor at the doctor's什么意思? 英语翻译at the doctor's 不用clinics she had been at the doctor's for a long time为什么用doctor's Where is your aunt?She is at the doctor‘s.为什么用doctor’s They are at the doctor's 对at the doctor's提问. They were at the doctor's yesterday morning.at the doctor's对 He arrived at the doctor's at twenty ___five. They are at the doctor's中的at the doctor's如果是就医的意思,at是动词吗?为什么 They are waiting -----.A at the doctor B at the doctor's C. They are waiting_______.A.at the doctor B.at the doctor's C.