8.  There's_____cooking oil lefi in the house. Would you go to the comer store and get____?

A． little; any

B．little; some

C．a little; some

D．a little; any

一定量的质量分数为14%的KOH溶液，若将其蒸发掉100g水后，其质量分数为28%，体积为80mL，则浓缩后的KOH的物质的量浓度为（　　）

A．2.2mol•L^-1

B．4mol•L^-1

C．5mol•L^-1

D．6.25mol•L^-1