题目

 Nobody but doctors, nurses or those_______ by Dr. Hu_______ to enter the patient’s room. A. invited; are allowed                         B. are invited; are allowed C. are invited; is allowed                            D. invited; is allowed 答案：【解析】选D。考查非谓语动词和主谓一致。第二空的谓语单复数与but后面的成分无关，与Nobody保持一致，故使用单数；第一空使用过去分词作后置定语，故选D项。

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