I’ll never forget the lesson last year.A. that I learnB. that I learnedC. what I learnD.

I’ll never forget the lesson last year.
A. that I learn
B. that I learned
C. what I learn
D. what I learned

A. that I learn(答案→)B. that I learnedC. what I learnD. what I learned解析：句意：我永远不会忘记去年上的一堂课。本句中先行词the lesson为下文定语从句的逻辑宾语，指物，故引导词用which或者that，结合所给选项，可知选B。

感谢回答，我学习了