I don't have white shoes for tomorrow's speech contest.
----My brother has_____ pair.whould you like to try ____on?
A a it B one it C one them D two them
选A .
【a是泛指一】；【one是强调个数】.
She got up to get some sleeping pills but found there was ____left at home.
A nothing B none C　something　 D nobody
选none
none可以指人也可以指物.这里的none=none of the sleeping pills
nobody指人=no one那为什么不用nothing呢 ?nothing的范围不具体，不仅仅是sleeping pills ，nothing可以是包罗万象。