While Leo was_____,Iwas going to class.
问题描述：
While Leo was_____,Iwas going to class.
A.in the doctor B.at the doctors C.at the doctor D.in the doctors
请选答案并说明理由,
答
B 应该是at the doctor's
当雷欧在医院、诊所的时候,我正去班上.:)