问题补充：
----Help yourself to some cakes, please．
---- ．
A. Thank you．Im full．
B. Oh, no, I can ．
C. Don mention it．
D. It is very nice．
答案：
(答案→)A. Thank you．Im full．
B. Oh, no, I can ．
C. Don mention it．
D. It is very nice．
解析：help yourself to sth，表示请自便吃一些东西，故用thank you ，I’m full，表示我饱了，故选A
