问题
选择题
“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
C。
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。