Lucy has three rooms , but __________ of them is big enough to hold the party
A:none
B:both
C:neither
D:each
人生路漫漫,有喜也有悲,因此,人应该( )
若x=﹣2,y=12,则y(x+y)+(x+y)(x﹣y)﹣x2的值等于( )