a mass of是什么意思

题目

a mass of是什么意思
We took _____ pictures of them
A> many of
B. masses of
c. a large amount of
为什么是用a mass of ?

答案

首先,A错,直接用many 就可以了,of 是多余的
C a large amount of 只能修饰不可数名词,而picture可数,故,C错,
综上所述,正确的答案为B