The policeman told the children _________ play in the street.
A:can't
B:to not
C:don't
D:not to
观察下列各算式:21=2,22=4,23=8,24=16,25=32,26=64,27=128,28=256,…根据上述算式的规律,你认为22010的末位数字应该是( )