题目内容：

You made the same mistake for [ ] second time ,dropping [ ]'n ' in the word 'government'.
A,a an B,a a C,a,the D,the ,an

优质解答

A a second time 再次,有一次,不表示顺序,所以不加the .
字母n 以元音音标发音开始,所以用an,表示一个的意思.