问题
John, _______ university professor, is considered to be _______ success as ______ expert in the agriculture research.
A:a; a; an
B:an; / ; an
C:the; /; an
D:a; the; an;
B:an; / ; an
C:the; /; an
D:a; the; an;
正确答案是：
同类题型
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