问题补充：
It is the first time that I this kind of tasty moon cake.
A. enjoy
B. have enjoyed
C. had enjoyed
Dam enjoying
答案：
A. enjoy
(答案→)B. have enjoyed
C. had enjoyed
D. am enjoying
解析：考察固定句型。It is the first time that sb +现在完成时：这是的一次某人做了某事。故B正确，句意：这是第一次我吃到这种味道的月饼。
