A:I don’t believe so.
B:I’m so glad.
C:What present do you need?
D:Many happy returns of the day!
填一填。
得对____
劣对____
愚蠢对____
闷闷不乐对____
无私奉献对____
x
…
-2
0
2
3
y
8
当x=-1时,y=____.