IX:
Mark the letter A, B, C or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.
Trả lời câu hỏi dưới đây:
After driving a car for ten miles, John suddenly realized that he has been driving in the wrong direction.
Đáp án là C. has been => had been, vì câu chia ở quá khứ