问题补充：
—Can you tell me ?
-- With Lucy’s help.
A. when you did it so well
B. when did you do it so well
C. how you did it so well
D. how did you do it so well
答案：
A. when you did it so well
B. when did you do it so well
(答案→)C. how you did it so well
D. how did you do it so well
解析：句意：--你能告诉我你是如何把它做得很好。--在露西的帮助下。分析考查宾语从句，语顺是陈述语顺。只有第一、三项符合，从答语中得知是问完成的方式，故选C
