“I took part in the TOEFL. It was really hard.” “Did you a lot?”A. Have you studiedB. Did

问题补充：

“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

答案：

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。