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

问题补充：

I’ll never forget the lesson last year.

A. that I learn

B. that I learned

C. what I learn

D. what I learned

答案：

A. that I learn

(答案→)B. that I learned

C. what I learn

D. 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。