一道SAT英语语法题

题目

一道SAT英语语法题
The gong,believed to have originated in Western Asia,reached China in the sixth century,where it continues to be used for a wide range of purposes,（including as） a military signal,a rhythmic accompaniment for vocal performance,and a ritual instrument.
括圈里面是需要替换的部分,其实不用替换这个就是正确的用法,而我选择的是which include.请英语帝解释这里问什么要用including as 为什么include要加ing难道没错吗?
一楼，但是正确的答案是不做任何改变，including as 是正确的！

答案

include 是动词,including 是介词,包括... as 作为.前面说用于广泛的目的,including 后面就列举用于哪方面的目的,翻译过了就是：包括作为军事信号,作为.
用which include 的话,显然你想用定语从句,这样先行词就是puroses, 但后面的举例并不是目的,所以用which include 不合适.