I failed in the exam but teacher refused to give me second chance.　A. a theB. a aC. th

问题补充：

I failed in the exam but teacher refused to give me second chance.

A. a, the

B. a, a

C. the, a

D. the, the

答案：

A. a, the

B. a, a

(答案→)C. the, a

D. the, the

解析：考察冠词。根据语境可知teacher指的是下文不给我机会的老师，故前面加定冠词表示特指。下文泛指任何一个第二次机会，故用不定冠词，选C。