A man was sitting in the doctor is

问题描述:

A man was sitting in the doctor is

应当是A man was sitting in the doctor`s office(医务室).我知道我打不来哪个逗号所以就只好这样。请问是什么意思1)按下红色圈圈的键,就可以打出这个符号的;2)一个男的正坐在医生办公室里.