we were amazed to see ( ) people wauting in line at Mary's.括号里填什么呢?an mount of ,a quantity of ,a number of,a great deal of 这四个短语该选哪个 以及用法

问题描述:

we were amazed to see ( ) people wauting in line at Mary's.
括号里填什么呢?an mount of ,a quantity of ,a number of,a great deal of 这四个短语该选哪个 以及用法

a number of 后面只能跟可数名词的复数形式,而an mount of ,a quantity of a great deal of 后面只能跟不可数名词 我觉得是a number of