MARK THE LETTER A, B, C OR D ON YOUR ANSWER SHEET TO INDICATE THE CORRECT ANSWER TO THE FOLLOWING QUESTION

Câu 13: Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to the following question. I don't know why Susan didn't do her homework but she said _______ A. she will definitely do. B. she was definitely doing. C. she had definitely done. D. she is definitely doing.