—Jane, what do you think of Mr. Green?—As ______ teacher, he oug

—Jane, what do you think of Mr. Green?
—As ______ teacher, he ought to set _______ good example to the pupils.
A、the, a
B、a, a
C、a, the
D、/ , the
【正确答案】：B
【题目解析】：考查冠词用法。teacher和example都是可数名词，都应用冠词修饰。此处它们都不是特指，所以都用不定冠词。