Tom, Jack and Rose were named as assistant professors. Believe it or not, three of them were of age.
A. 不填; an
B. 不填; the
C. the; an
D. the; the
网友回答
A. 不填; an
B. 不填; the
(答案→)C. the; an
D. the; the
解析：考查冠词的用法。句意“汤姆，杰克和罗斯被任命为助教。信不信由你，他们三个的年龄相同。”这里特指“他们三个”，用the；of an age“同一年龄”。故选C。