Mark the letter A, B, C, or D on your answer sheet to indicate the cor

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.    

So far I ____ any of the exams at school.

• A. A. haven't been failing
• B. B. hadn't failed
• C. C. didn't fail
• D. D. haven't failed

Tạm dịch: Cho đến nay tôi đã không thất bại trong bất kỳ kỳ thi nào ở trường.