as “a class of one ”, independent learning enabled you to study at your own pace.
A. Describing
B. Described
C. To be described
D. Being described
网友回答
A. Describing
(答案→)B. Described
C. To be described
D. Being described
解析：本题考查非谓语动词。逻辑主语independent learning与describe为被动关系，故用过去分词，选B。