Mark the letter A, B, C, or D on your...

Câu hỏi: Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each of sentences in the following questions.

A. By the time I've taken my exam, I will have started training to be an accountant for a year

B. By the time I take my exam, I will have been in training to be an accountant for a year.

C. By the time I took my exam, I had been trained to be an accountant for a year.

D. By the time I've taken my exam, I will be training for a year.