The boy Ling Feng in the school is really unusual student.A. called; aB. calling; aC. ca

问题补充：

The boy Ling Feng in the school is really unusual student.

A. called; a

B. calling; a

C. called; an

D. calling; an

答案：

A. called; a

B. calling; a

(答案→)C. called; an

D. calling; an

解析：前一空用过去分词called作定语，修饰the boy，unusual前应用不定冠词an。故选C。