问题补充:
Nobody but doctors, nurses or those by Dr. Hu to enter the patients room.
A. invited; are allowed
B. are invited; are allowed
C. are invited; is allowed
D. invited; is allowed
答案:
A. invited; are allowed
B. are invited; are allowed
C. are invited; is allowed
(答案→)D. invited; is allowed
解析:考查过去分词做定语和主谓一致:句意:除了医生,护士或胡博士邀请的人没有人可以进入病人的房间。第一空填定语,因为those和invite是被动关系,用过去分词做定语,第二空是谓语,因为主语是but连接的,和前面的主语nobody一致,用单数is,选D。