Since you got ________ wrong answer, you should do it for ________ second time．

A.a; a

B.the; the

C.a; the

D.the;/

答案及解析： A

前面的空是第一次提到的可数名词，属非特指，故用不定冠词；“不定冠词+序数词+time”这一结构，表示“再次”