---Thank you Lucy.-.A. I’m sorryB. Of courseC. You are welcomeD. OK

问题补充：

---Thank you，Lucy. ---.

A. I’m sorry

B. Of course

C. You are welcome

D. OK

答案：

A. I’m sorry

B. Of course

(答案→)C. You are welcome

D. OK

解析：句意：谢谢你，露西。不用谢。A项：对不起。B项：当然。C项：不客气。D项：好。根据句意：谢谢你，其答语应该是不用谢，不客气，可知选C.