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做的如此的好吗？--在Lucy的帮助下。考查宾语从句，宾语从句要用陈述语序，从回答中体现出是如何应用how提问，故选C
