--Let’s finish off the rest of the cake.
--None for me, thanks. I more than enough.
A. had
B. will have
C. have had
D. am having
网友回答
A. had
B. will have
(答案→)C. have had
D. am having
解析：考察时态。句意：让我们吃完蛋糕的剩余部分吧!——我不要了，谢谢。我已经吃的够多了。结合语境可知下文描述的是现在已经完成的动作，故选C。，故选C