Hi Sunny your new flat is so nice!Thanks .A. my pleasureB. don’t mention itC. h

问题补充：

--- Hi, Sunny, your new flat is so nice!

--- Thanks, .

A. my pleasure

B. don’t mention it

C. help yourself

D. make yourself at home

答案：

A. my pleasure

B. don’t mention it

C. help yourself

(答案→)D. make yourself at home

解析：考查交际用语。my pleasure 不用谢，don’t mention it 别提了，help yourself 请随便，make oneself at home，像呆在自己家里一样，句意：你好，Sunny，你的新房子是如此的漂亮！谢谢你就像呆在自己吧。所以选D。