问题
选择题
Nobody but doctors or nurses and those ________ by Dr Li ________ to enter the patient’s room.
A.being invited;allowed
B.are invited;are allowed
C.invited;is allowed
D.invited;are allowed
答案
答案:C
考查非谓语动词和主谓一致。第一空为过去分词短语作定语;第二空主语的中心词是nobody,所以选C项。