“I took part in the TOEFL. It was really hard.” “Did you a lot?”
A. Have you studied
B. Did you study
C. Had you studied
D. Do you study
网友回答
A. Have you studied
B. Did you study
(答案→)C. Had you studied
D. Do you study
解析：根据took的时态可知，“参加托福考试”发生在过去；而对方问“是否努力学习过?”这肯定问的是参加考试以前的事，故用过去完成时。