Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following question
I started training to be an accountant six months ago. I’ve got more months to go, then I have to take exams
A. By the time I’ve taken my exams, I will have started training to be an accountant for a year
B. By the time I take my exams, I will have been in training to be an accountant for a year.
C. By the time I took my exams, I would have trained to be an accountant for a year
D. By the time I’ve taken my exams, I will be training for a year