[选择]I thought there was somebody in the house because there was ___on inside .A.a light B.light
问题描述：
[选择]I thought there was somebody in the house because there was ___on inside .A.a light B.light
答
A a light
light 表示"灯,电灯"的时候是可数
表示光的时候是不可数
there was a light on
有一盏灯开着