( ) 1.How much meat do you want to have,sir?_________ .

( ) 1.How much meat do you want to have,sir?_________ .
( ) 1.How much meat do you want to have,sir?
_________ .
A.One and a half kilo B.One and a half kilos
C.One kilo and half D.One kilos and a half
为什么选B不选D?