-- Can I have some more ice cream, Mum?
-- Sorry. There is _______ left in the fridge.
A:none
B:nothing
C:no one
D:anything
现有20个数,它们构成一个以1为首项,﹣2为公比的等比数列,若从这20个数中随机抽取一个数,则它大于8的概率为( )
12世纪中期,下列政权并存的一组是( )
Tom had to______ the invitation to the party last weekend because he was too busy.