Nobody but doctors and those __________by Dr.Zhang ______ the room.
问题描述：
Nobody but doctors and those __________by Dr.Zhang ______ the room.
A.invited;is allowed to enter
B.are invited;are allowed entering
C.invited;is allowed entering
D.is invited;are allowed to enter
请说明理由及这里面包含的语法问题
答
选答案A
those（that are） invited by意为：那些被邀请的人
allow sb to do sth
综上所以选A